RESUMO

Introduction: Vitamin C supplementation has been seen as a supportive treatment to control and prevent complications of COVID-19 by enhancing the immune response against infection. However, the effects of high doses of this vitamin are not yet fully understood. Objective: To analyze the effects of high-dose vitamin C in patients with COVID-19. Methods: This was a systematic review, using original studies published from April 2020 to November 2022 in PubMed, ScienceDirect, Scopus and Web of Science databases. The combination of descriptors registered in Medical Subject Headings (MeSH) used to search for articles were: (("vitamin C" OR "ascorbic acid") AND ("COVID-19" OR "SARS-CoV-2" OR "coronavirus")). Original articles of clinical trials conducted with patients diagnosed with COVID-19 and submitted to high-dose vitamin C supplementation were included. Results: Eligible studies included patients in intensive care units, wards, or outpatient clinics, who were given doses of vitamin C, ranging from 6,000 to 8,000 mg/day, with an average duration of 6.25 days of supplementation and mostly intravenous administration. A reduction in fever and myalgia was observed, as well as an improvement in oxygen saturation and lung impairment rate. Conclusion: The role of high-dose vitamin C in patients affected by COVID-19 requires further study, however, to date, the results have been promising for symptom reduction and improvement in lung function and oxygenation.

Introducción: La administración de suplementos de vitamina C se ha considerado un tratamiento de apoyo para controlar y prevenir las complicaciones del COVID-19 al mejorar la respuesta inmunitaria contra la infección. Sin embargo, los efectos de dosis elevadas de esta vitamina aún no se conocen en su totalidad. Objetivo: Analizar los efectos de altas dosis de vitamina C en pacientes con COVID-19. Métodos: Se trata de un estudio de revisión sistemática, utilizando artículos originales publicados desde abril de 2020 hasta noviembre de 2022 en las bases de datos PubMed, ScienceDirect, Scopus y Web of Science. Para la búsqueda de los artículos se utilizó la combinación de descriptores registrados en Medical Subject Headings (MeSH): (("vitamin C" OR "ascorbic acid") AND ("COVID-19" OR "SARS-CoV-2" OR "coronavirus")). Se incluyeron artículos originales de tipo ensayo clínico realizados con pacientes diagnosticados con COVID-19 y sometidos a suplementación con altas dosis de vitamina C. Resultados: Los estudios elegibles se realizaron con pacientes ingresados en unidades de cuidados intensivos, salas o ambulatorios, a los que se administraron dosis de vitamina C que oscilaban entre 6.000 y 8.000 mg/día, con una duración media de 6,25 días de suplementación y vía de administración mayoritariamente intravenosa. Se observó una reducción de la fiebre y las mialgias, además de una mejoría de la saturación de oxígeno y de la tasa de compromiso pulmonar. Conclusión: El papel de las dosis altas de vitamina C en pacientes afectados por COVID-19 requiere más estudios; sin embargo, hasta la fecha, los resultados han sido prometedores en cuanto a la reducción de los sintomas, y la mejora de la función pulmonar y la oxigenación.

RESUMO

Lipoic acid (LA) is a mitochondrial coenzyme that, depending on the concentration and exposure time, can behave as an antioxidant or pro-oxidant agent and has a proven ability to modulate metabolism by promoting lipid and glucose oxidation for energy production. To assess the effects of LA on energy metabolism and redox balance over time, Artemia sp. nauplii was used as an animal model. The administered concentrations of the antioxidant were 0.05, 0.1, 0.5, 1.0, 5.0, and 10.0 µM. Therefore, possible differences in protein, triglyceride, glucose, and lactate concentrations in the artemia samples and total ammoniacal nitrogen (TAN) in the culture water were evaluated. We also measured the effects of LA on in vivo activity of the electron transport system (ETS), antioxidant capacity, and production of reactive oxygen species (ROS) at 6, 12, 18, and 24 h post-hatching. There was a decrease in glucose concentration in the LA-treated animals, and a decrease in ammonia production was observed in the 0.5 µM LA treatment. ETS activity was positively regulated by the addition of LA, with the most significant effects at concentrations of 5.0 and 10.0 µM at 12 and 24 h. For ETS activity, treatments with LA presented the highest values at 24 h, a period when ROS production decreased significantly, for the treatment with 10.0 µM. LA showed positive regulation of energy metabolism together with a decrease in ROS and TAN excretion.

RESUMO

Objetivo: Avaliar a nutrição de pacientes cirúrgicos com neoplasia no trato gastrointestinal em uso de suplemento alimentar. Método: Trata-se de uma revisão sistemática de literatura realizada nas bases de dados Google Scholar, PubMed, Scielo e Web of Science, no período de maio a junho de 2021, sem recorte temporal ou restrição de idioma, através dos descritores: "enteral nutrition e immunenutrition", "cancerpatients e gastriccancerpatients", "preoperative, perioperative e postoperative". Resultados: Foram selecionados 8 estudos, destes, a maioria identificou benefícios na utilização da suplementação em razão da diminuição de células TNF-a, do cortisol e da transferrina, diminuindo o tempo de internação e melhora no estado funcional dos participantes suplementados. Conclusão: Os achados foram positivos, no entanto, houve algumas limitações como a heterogeneidade em abordagens terapêuticas e perda de pacientes durante o estudo, apesar de apresentarem baixo risco de viés, ainda há a necessidade de mais estudos.(AU)

Objective: To evaluate the nutrition of surgical patients with neoplasia in the gastrointestinal tract using food supplements. Method: This is a systematic literature review carried out in Google Scholar, PubMed, Scielo and Web of Science databases, from May to June 2021, without time frame or language restriction, using the descriptors: "enteral nutrition and immunenutrition", "cancerpatients and gastriccancerpatients", "preoperative, perioperative and postoperative". Results: Eight studies were selected, most of which identified benefits in the use of supplementation due to the decrease in TNF-a cells, cortisol and transferrin, reducing the length of hospital stay and improving the functional status of supplemented participants. Conclusion: The findings were positive, however, there were some limitations such as heterogeneity in therapeutic approaches and loss of patients during the study, despite having a low risk of bias, there is still a need for further studies(AU)

Objetivo: Evaluar la nutrición de pacientes quirúrgicos con neoplasia en el tracto gastrointestinal utilizando suplementos alimenticios. Método: Se trata de una revisión sistemática de la literatura realizada en las bases de datos Google Scholar, PubMed, Scielo y Web of Science, de mayo a junio de 2021, sin franja horaria ni restricción de idioma, utilizando los descriptores: "nutrición enteral e inmunonutrición", "pacientes oncológicos y pacientes con cáncer gástrico", "preoperatorio, perioperatorio y postoperatorio". Resultados: Se seleccionaron ocho estudios, la mayoría de los cuales identificaron beneficios en el uso de la suplementación por la disminución de células TNF-a, cortisol y transferrina, reduciendo la estancia hospitalaria y mejorando el estado funcional de los participantes suplementados. Conclusión: Los hallazgos fueron positivos, sin embargo, hubo algunas limitaciones como la heterogeneidad en los enfoques terapéuticos y la pérdida de pacientes durante el estudio, a pesar de tener un bajo riesgo de sesgo, aún existe la necesidad de realizar más estudios(AU)

Assuntos

RESUMO

Objetivo: Avaliar a nutrição de pacientes cirúrgicos com neoplasia no trato gastrointestinal em uso de suplemento alimentar. Método: Trata-se de uma revisão sistemática de literatura realizada nas bases de dados Google Scholar, PubMed, Scielo e Web of Science, no período de maio a junho de 2021, sem recorte temporal ou restrição de idioma, através dos descritores: "enteral nutrition e immunenutrition", "cancerpatients e gastriccancerpatients", "preoperative, perioperative e postoperative". Resultados: Foram selecionados 8 estudos, destes, a maioria identificou benefícios na utilização da suplementação em razão da diminuição de células TNF-a, do cortisol e da transferrina, diminuindo o tempo de internação e melhora no estado funcional dos participantes suplementados. Conclusão: Os achados foram positivos, no entanto, houve algumas limitações como a heterogeneidade em abordagens terapêuticas e perda de pacientes durante o estudo, apesar de apresentarem baixo risco de viés, ainda há a necessidade de mais estudos.(AU)

Objective: To evaluate the nutrition of surgical patients with neoplasia in the gastrointestinal tract using food supplements. Method: This is a systematic literature review carried out in Google Scholar, PubMed, Scielo and Web of Science databases, from May to June 2021, without time frame or language restriction, using the descriptors: "enteral nutrition and immunenutrition", "cancerpatients and gastriccancerpatients", "preoperative, perioperative and postoperative". Results: Eight studies were selected, most of which identified benefits in the use of supplementation due to the decrease in TNF-a cells, cortisol and transferrin, reducing the length of hospital stay and improving the functional status of supplemented participants. Conclusion: The findings were positive, however, there were some limitations such as heterogeneity in therapeutic approaches and loss of patients during the study, despite having a low risk of bias, there is still a need for further studies.(AU)

Objetivo: Evaluar la nutrición de pacientes quirúrgicos con neoplasia en el tracto gastrointestinal utilizando suplementos alimenticios. Método: Se trata de una revisión sistemática de la literatura realizada en las bases de datos Google Scholar, PubMed, Scielo y Web of Science, de mayo a junio de 2021, sin franja horaria ni restricción de idioma, utilizando los descriptores: "nutrición enteral e inmunonutrición", "pacientes oncológicos y pacientes con cáncer gástrico", "preoperatorio, perioperatorio y postoperatorio". Resultados: Se seleccionaron ocho estudios, la mayoría de los cuales identificaron beneficios en el uso de la suplementación por la disminución de células TNF-a, cortisol y transferrina, reduciendo la estancia hospitalaria y mejorando el estado funcional de los participantes suplementados. Conclusión: Los hallazgos fueron positivos, sin embargo, hubo algunas limitaciones como la heterogeneidad en los enfoques terapéuticos y la pérdida de pacientes durante el estudio, a pesar de tener un bajo riesgo de sesgo, aún existe la necesidad de realizar más estudios.(AU)

Assuntos

RESUMO

A intervenção nutricional precoce em crianças com câncer, associada com o uso de suplementos nutricionais hiperproteicos orais (SO), é de extrema importância. Quando se trata de um público infantil, é importante destacar a relevância da apresentação dos utensílios oferecidos nas refeições. A melhor aceitação de SO, quando ofertado em copo temático, pode contribuir para melhora do estado nutricional e melhor prognóstico do tratamento. O objetivo desse estudo foi avaliar a aceitação do suplemento mix artesanal fortificado, sob apresentação de duas formas diferentes: copos descartáveis versus copos temáticos, para crianças e adolescentes em tratamento oncológico. Trata-se de uma pesquisa prospectiva realizada com crianças e adolescente em tratamento oncológico. Na 1a etapa do estudo, os pacientes receberam o suplemento em copos temáticos e na 2a etapa receberam em copo descartável. A aceitação foi avaliada através da escala hedônica e numérica. 44 crianças e adolescentes fizeram uso do copo descartável e 36 do copo temático. A oferta de diferentes copos não interferiu na aceitação do suplemento (p>0,3). Entretanto, a escala numérica apresentou maior média da pontuação na apresentação do copo temático (p<0,005), onde 90% das crianças e adolescentes que aceitaram ≥ 50% relataram "gostei" e "adorei" (p<0,005), obtendo também diferença na pontuação para as variáveis: cor, sabor, textura e odor (p<0,005). Os dados obtidos nesse estudo mostraram que o copo temático não influenciou no aumento do consumo do suplemento, porém reforçou que a apresentação de utensílios temáticos utilizados nas refeições de crianças e adolescentes pode ser uma estratégia benéfica para a diminuição de desnutrição em pacientes com câncer.

Early nutritional intervention in children with cancer, associated with the use of high-protein oral nutrition supplements (OS), is of utmost importance. When it comes to children, it is important to highlight the relevance of the presentation of the utensils offered in the meals. The better acceptance of OS, when offered in a themed cup, can contribute to an improvement in the nutritional status and a better prognosis of the treatment. The objective of this study was to evaluate the acceptance of the fortified artisanal supplement mix, presented in two different ways: disposable cups versus themed cups, for children and adolescents undergoing cancer treatment. This is a prospective study carried out with children and adolescents undergoing cancer treatment. In the 1st stage of the study, the patients received the supplement in themed cups and in the 2nd stage they received the supplement in a disposable cup. Acceptance was assessed using the hedonic and numerical scales. 44 children and adolescents used the disposable cup and 36 the themed cup. The offer of different cups did not interfere with the acceptance of the supplement (p>0.3). However, the numerical scale presented a higher average score in the presentation of the themed cup (p<0.005), where 90% of children and adolescents who accepted ≥ 50% reported "liked" and "loved" (p<0.005), also obtaining a difference. As for the score for the variables: color, taste, texture, and odor (p<0.005). The data obtained in this study showed that the themed cup did not influence the increase in the consumption of the supplement but reinforced that the presentation of thematic utensils used for the meals of children and adolescents can be a beneficial strategy to reduce malnutrition in cancer patients.

RESUMO

La anemia es la disminución de la concentración de la hemoglobina por debajo de los límites inferiores considerados como normales de acuerdo a la edad, sexo y el contexto de la altitud. La prevalencia de Anemia en menores de 5 años en Bolivia, departamento La Paz es de 60,3%, constituyéndose en la principal barrera para lograr el desarrollo social y económico. La presente investigación contribuye al cumplimiento de uno de los Objetivos de Desarrollo Sostenible para la trasformación de nuestro mundo, que es Poner fin al hambre, lograr la seguridad alimentaria y la mejora de la nutrición. OBJETIVO: determinar valores de hemoglobina en niños y niñas de 2 a 5 años, que viven a una altura de 3073 m.s.n.m. que consumieron Chispitas nutricionales en marzo 2018. METODOLOGÍA: fue un estudio cuantitativo, descriptivo de tipo trasversal, con una muestra de 43 entre niños y niñas que cumplieron los criterios de inclusión. MÉTODO: se utilizó el sistema portátil Fotómetro B Hemoglobin HemoCue, para procesar las muestras de sangre capilar y medir los niveles de concentración de hemoglobina. Para determinar el punto de corte de los niveles de hemoglobina a una altura de 3073 m.s.n.m. y se utilizó el factor de corrección para la altura de 1.9 g/dL Se considera 11.5 a 9.5 g/dL anemia leve; 9.5 a 7,5 g/dL anemia moderada y menor a 7,5 g/dL anemia severa. RESULTADOS: en niños y niñas menores de 5 años que viven a una altura de 3073 m.s.n.m. la prevalencia de anemia ferropénica es de 74%, los niveles de hemoglobina se incrementan según la edad (p < 0.05) y no se asocia al consumo de chispitas nutricionales con un (p > 0.05). CONCLUSIONES: los niveles de hemoglobina se incrementan según la edad y no así con el consumo de chispitas nutricionales. También se evidencia el promedio de hemoglobina no ajustada en ambos sexos, con una leve similitud entre los mismos, femenino 12,43 g/dL y masculino 12,46 g/dL; valores muy por debajo de umbrales óptimos para definir anemia a gran altitud.

The anemy is the decrease of hemoglobine under the normal limits considered healthy acording to the age, gender and the sea level context. The prevalence of the anemia in children under 5 years in La Paz department in Bolivia is 60,3%, so, it is one of the main impediments to achieve the social and economic development. This research contributes to achieve one of the world's substantiable development objectives, which is to end hunger, to achieve the food security and improve nutrition. OBJECTIVE: to determine the values of hemoglobin in infants 2-5 years old who got nutritional supplements chispitas, and lived in a height of 3073 meters above sea level, March 2018. METODOLOGY: it was a quantitative descriptive cross sectional research, a sample of 43 infants who had all the requirements to the research. METHOD: it was used the photometric system B Hemoglobin HemoCue to process and to determine the hemoglobin levels of the capillary blood samples. At a height of 3073 meters above sea level, the cut-off point of hemoglobin with a cross-correlation figure of 1.9 is the following: from 11.5 to 9.5mg/dL mild anemia, from 9.5 to 7,5 mg/dL moderate anemia and less of 7,5mg/dL severe anemia. RESULTS: in infants under 5 year olds who lived at 3073 meters over sea level, the prevalence of iron deficiency anemia is 74%, the hemoglobin levels increases according to the age (p< 0,05) and not to the use of the nutritional supplements Chispitas (p > 0,05). CONCLUSIONS: the hemoglobin levels increase according to age and not to the use of nutritional supplements Chispitas. The average hemoglobin in both sexes is also evidenced, slightly similar between them, female 12.43 g/dL and male 12.46 g/dL; values below normal limits considered healthy in order to define anemia at high altitude.

Assuntos

RESUMO

Curcumin is the main phenolic compound in turmeric. It has been investigated recently due to its numerous medicinal properties and health benefits. However, few studies assessed the effects of curcumin supplementation on physical activity practice. Therefore, the purpose of this review is to assess the available evidences with human beings about the potential effects of curcumin supplementation on sport and physical exercise. This systematic review was conducted within the period from January to February, 2019, following the recommendations of the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes (PRISMA) guidelines. The LILACS, Medline, SciELO and PubMed databases were used for the search, with no publication date limit. The following terms, with the respective Boolean operators, were searched: "curcumin" AND sports; "curcumin" AND exercise; curcumin AND "aerobic exercise"; "curcumin" AND "resistance exercise"; "curcumin" AND "endurance exercise"; "curcumin" AND "strength exercise". Eleven papers were selected for this review. Most of the studies displayed positive effects of the curcumin supplementation for athletes and physical exercise practitioners, and no side effects were reported. Participants supplemented with curcumin displayed reduced inflammation and oxidative stress, decreased pain and muscle damage, superior recovery and muscle performance, better psychological and physiological responses (thermal and cardiovascular) during training and improved gastrointestinal function. Curcumin supplementation appears to be safe and beneficial for sport and physical exercise in human beings. PROSPERO (CRD42019126763).

Assuntos

RESUMO

Objectives: Pyridoxine plays a key role in the development of the human nervous system. Several reports suggest that administration of high doses of pyridoxine can be helpful in improving disturbances such as anxiety and pyridoxine-dependent epilepsy, although it has also been associated with a proconvulsive action. In this study, we investigated in developing rats the effects of repeated administration of various doses of pyridoxine on anxiety-like behavior and the brain excitability-related phenomenon known as cortical spreading depression (CSD).Methods: From postnatal day (P) 7 to P27, Wistar rat pups received per gavage pyridoxine hydrochloride (1 mg/kg/day, or 5 mg/kg/day, or 10 mg/kg/day). On P60-70, the animals were tested in the elevated plus maze (EPM) to evaluate anxiety-like behavior. On P71-80, we recorded the CSD (4-hour recording session).Results: Compared with naïve (gavage-free) and saline-treated controls, pyridoxine-treated groups displayed a significant (p < 0.001) increase in CSD propagation velocity and amplitude of the CSD negative direct-current (DC)-shift, and a decrease in the CSD DC-shift duration. These effects were long-lasting and dose-dependent. In the EPM, no significant pyridoxine-associated effect was observed.Discussion: Our data demonstrate a novel action of pyridoxine on an electrical activity-related phenomenon (CSD) in the developing brain, confirming the hypothesis that the chronic treatment with pyridoxine early in life modulates CSD. Data on CSD propagation suggest that pyridoxine at a high dose might act as a prooxidant agent in the developing brain, a hypothesis that deserves further testing.

Assuntos

RESUMO

Oral nutritional supplements are widely recommended to head-and-neck cancer patients undergoing anti-cancer treatment; however, their effects on the outcomes of most importance to patients are unclear. This study aimed to systematically review the evidence of effect of oral nutritional supplements on mortality, treatment tolerance, quality of life, functional status, body weight and adverse effects. We searched PubMed, Embase, CENTRAL, LILACS, Web of Science, CINAHL, two trial registry platforms, three sources of grey literature and reference lists of included studies. We assessed the risk of bias using the revised Cochrane risk-of-bias tool (RoB 2), and certainty of evidence using the GRADE (Grading of Recommendations Assessment, Development and Evaluation) approach. We used random-effects models with Hartung-Knapp correction for the meta-analyses. We included fifteen trials, of which five were ongoing or unpublished, providing evidence in four comparisons. We found very low to low certainty evidence for the effect of oral nutritional supplements on mortality, treatment tolerance, quality of life, functional status and adverse effects. When compared with nutritional counselling alone, nutritional counselling plus oral nutritional supplements probably increased body weight slightly. We also found adverse events relating to supplements use such as nausea, vomiting and feeling of fullness. Possible increases in mortality, treatment tolerance and quality of life besides a possible decrease in functional status are worthy of further investigation. Future research could attempt to address the clinical importance of a probable increase in body weight. Possible adverse effects of the use of oral nutritional supplements should not be overlooked.

Assuntos

RESUMO

BACKGROUND & AIMS: Quality indicators are important tools in clinical practice for assessing and monitoring the quality of care in nutritional therapy. Application of these indicators can improve care and may help to decrease the high frequency of malnutrition and associated hospital costs. Therefore, the purpose of the present study was to estimate the frequency of oral nutritional supplements (ONS) use and to evaluate compliance with the four available quality indicators in oral nutritional therapy (QIONT) in a university hospital. METHODS: A prospective study was conducted from November 2017 to May 2018, using data from all patients with an ONS prescription aged 18 years or older admitted to the medical clinical or surgical clinical wards. Four indicators were investigated, as recommended by the International Life Science Institute. RESULTS: Of the 727 hospitalized patients in the included wards, 214 were on ONS. The frequency of ONS prescription was 29.4%. Of the 4 QIONT evaluated, none achieved the goals: frequency of subjective global assessment and reassessment nutritional (48.1% and 5.6%, respectively); frequency of non-compliance for the indication of ONS (73.36%); and fasting over 24 h during ONS (50%). CONCLUSION: A high frequency of non-compliance (100% of QIONT) was observed in hospitalized patients on ONS in medical clinical and surgical clinical wards. These results will enable health professionals in the evaluated service to elaborate protocols to improve the evaluation and recording of the nutritional follow-up of hospitalized patients on ONS. This will help to improve the quality of nutritional care.

Assuntos

RESUMO

PURPOSE OF REVIEW: As of 13 September 2020, almost 28 million confirmed cases of COVID-19 including more than 920,000 deaths have been reported to the World Health Organization. The SARS-CoV-2 pandemic represents a potential threat to patients and healthcare systems worldwide. Patients with the worst outcomes and higher mortality are reported to include older adults, polymorbid individuals, and malnourished people in general. The purpose of this review is to provide concise guidance for the nutritional management of individuals with COVID-19 based on the current literature and focused on those in the non-ICU setting or with an older age and polymorbidity, which are independently associated with malnutrition and its negative impact on mortality. RECENT FINDINGS: Prolonged hospital stays are reported to be required for individuals with COVID-19, and longer acute setting stays may directly worsen or cause malnutrition, with severe loss of skeletal muscle mass and function, which may lead to poor quality of life and additional morbidity. Nutritional therapy is among the mainstay of therapeutic principles and one of the core contents of comprehensive treatment measures. The current COVID-19 pandemic is unprecedented. The prevention, diagnosis, and treatment of malnutrition should therefore be routinely included in the management of individuals with COVID-19.

Assuntos

RESUMO

ABSTRACT Background: Oral nutritional supplements aim at offsetting dietary deficits and helping to meet energy and protein targets. Due to the absence of data about their role in food intake, it is necessary to evaluate the contribution of these products to the estimated needs of hospitalized patients. Methods: This is a prospective longitudinal study with hospitalized patients over 18 years of age, admitted to a public university hospital, who were given oral nutritional supplements, according to clinical guidelines. Food intake was quantified throughout the period such products were prescribed. Results: 805-day food intake follow-up and record of 128 patients, who took supplements for 6.4 days on average. The use of nutritional supplements demonstrated a significant contribution to the input of both energy (1576 kcal/day versus 1263 kcal/day, p<0.001) and protein (68.7 g/day versus 50.3 g/day, p<0.001). Conclusions: Nutritional supplements help increase food intake and achieve nutritional goals when prescribed in a hospital setting.

RESUMEN Antecedentes: los suplementos nutricionales orales tienen como objetivo compensar los déficits dietéticos y ayudar a cumplir los objetivos de energía y proteínas. Debido a la ausencia de datos sobre su papel en la ingesta de alimentos, es necesario evaluar la contribución de estos productos a las necesidades estimadas de los pacientes hospitalizados. Métodos: Este es un estudio longitudinal prospectivo con pacientes hospitalizados mayores de 18 años, ingresados en un hospital universitario público, que recibieron suplementos nutricionales orales, según la derivación clínica. La ingesta de alimentos se cuantificó durante todo el período en que se prescribieron dichos productos. Resultados: seguimiento de la ingesta alimentaria de 805 días y registro de 128 pacientes, que tomaron suplementos durante 6,4 días en promedio. El uso de suplementos nutricionales demostró una contribución significativa al aporte de energía (1576 kcal/día versus 1263 kcal/día, p< 0,001) y proteína (68,7 g/día versus 50,3 g/día, p<0,001). Conclusiones: los suplementos nutricionales ayudan a aumentar la ingesta de alimentos y alcanzar objetivos nutricionales cuando se prescriben en un entorno hospitalario.

Assuntos

RESUMO

ABSTRACT The purpose of this study was to explore the meanings of supplement use among those who engage in physical activity in fitness centers. A qualitative study was carried out based on 67 questionnaires answered on the internet by practitioners of physical training. There was also an observation of the groups in the Facebook, the dynamic and other aspects such as discussions, messages, profiles and images. It was detected that physical activity practitioners care more about the quantity of substances ingested than any other factor that may lead them to suffer certain health risks. They believe that so-called "excesses" may cause diseases to the internal organs. Although the participants believe that their own consumption of supplements does not compromise their health, a biomedical authority is crucial for them to recognize whether or not they are at risk. The consumption of supplements can vary depending on what is understood to be excessive and which risks may compromise the body. There are many motivations for managing these substances. Health risks should not be analyzed solely from a biomedical perspective, but also addressed by the socio-cultural logic of the perceptions and meanings attributed by the subjects to the body and the management thereof.

RESUMO O objetivo deste estudo foi explorar os significados do uso de suplementos entre aqueles que praticam atividade física em academias de ginástica. Um estudo qualitativo foi realizado com base em 67 questionários respondidos na internet por praticantes de atividade física. Houve também uma observação dos grupos na Facebook, a dinâmica e outros aspectos como discussões, mensagens, perfis e imagens. Foi detectado que os praticantes de atividade física se importam mais com a quantidade de substâncias ingeridas do que com qualquer outro fator que possa levá-los a sofrer certos riscos à saúde. Eles acreditam que os chamados "excessos" podem causar doenças aos órgãos internos. Embora os participantes acreditem que seu próprio consumo de suplementos não compromete a saúde, a autoridade biomédica é crucial para que eles reconheçam se estão ou não em risco. O consumo de suplementos pode variar dependendo do que se entende ser excessivo e quais os riscos que podem comprometer o corpo. Existem muitas motivações para gerenciar essas substâncias. Os riscos para a saúde não devem ser analisados apenas a partir de uma perspectiva biomédica, mas também abordados pela lógica sociocultural das percepções e significados atribuídos pelos sujeitos ao corpo e ao seu gerenciamento.

Assuntos

RESUMO

RESUMEN Las úlceras por presión (UPP) y úlceras venosas (UV) son frecuentes en adultos y adultos mayores. En Chile un 70% de las heridas crónicas corresponden a UV y la prevalencia de UPP en pacientes hospitalizados es de 28%. El objetivo de esta revisión es analizar la evidencia disponible respecto al tratamiento nutricional de individuos con UPP y UV. Estas úlceras tienen diferentes etiologías, pero ambas provocan un aumento de requerimientos energéticos, proteicos y de micronutrientes. La cicatrización de heridas depende de varios factores como: el tipo de úlcera, estado nutricional, patologías presentes, el tipo de curación y el tratamiento médico. La terapia nutricional establece en la mantención o aumento de peso de estos pacientes, administración adecuada de proteínas y suplementación de energía, proteínas o micronutrientes cuando se presente déficit.

ABSTRACT Pressure and venous ulcers are common in adults and the elderly. In Chile, 70% of chronic wounds correspond to venous ulcers and the prevalence of pressure ulcers in hospitalized patients is 28%. The aim of this review was to analyze the available evidence regarding the nutritional treatment of individuals with pressure and venous ulcers. These ulcers have different etiologies, but both produce an increase in energy, protein, and micronutrient requirements. The healing of wounds depends on several factors such as the type of ulcer, nutritional status, current co-morbidities, healing type and medical treatment. Nutritional therapy should be based on weight maintenance or gain of these patients, adequate administration of proteins and energy supplementation, or protein or micronutrients when a deficiency occurs.

Assuntos

RESUMO

In childhood and adolescence an adequate mineral intake is essential for normal growth and immune function, and to prevent chronic diseases in adulthood. The aim of this study was to analyse the dietary intake of Ca, Mg, Fe, Zn and Cu in children and adolescents from an orphanage-school in Guatemala and to assess the mineral contribution of nutritional supplements used by this population. Mineral content was analysed in nutritional supplements, bioaccesible fractions obtained after an in vitro gastrointestinal method, and diets sampled by a 7-day duplicate diet study. The average mineral content in the duplicate diets, including supplements, was (mg/d): Ca 452, Mg 230, Fe 25, Zn 8 and Cu 0.22. Especially Ca and Cu values were below recommended daily intakes. The content of these minerals in the nutritional supplements (mg/serving) was 49-112 for Ca, 1.2-3.8 for Fe, 24-47 for Mg, 0.7-4.16 for Zn and 0.08-0.23 for Cu. A great proportion of dietary minerals was provided by supplements, the contribution of which was: Ca 53.1%, Mg 58.4%, Fe 27.6%. Zn 82.2% and Cu 98.5%. Mineral bioaccessibility in supplements was particularly low for Ca and, to a lesser extent, for Fe and Zn. In spite of the high supplement consumption (up to 4 servings/d) important mineral deficiencies were detected in the diet of institutionalised children. Findings suggest that formulation and nutritional values of supplements used in Latin America should be carefully reviewed, in order to be a useful tool in the prevention and treatment of hidden hunger.

Assuntos

RESUMO

Abstract To evaluate the effect of vitamin A supplementation in postpartum infants and women on serum retinol levels and breast milk. The databases Medline, PubMed, Lilacs and SciELO were consulted. The descriptors used were vitamin A, dietary supplement, child, postpartum period, infant and nutrition programs policies. Search found 7432 articles. After elimination of duplicity and application of eligibility criteria, 8 studies remained. All evaluated the effect of vitamin A supplementation on immediate postpartum, five studies used retinyl palmitate supplementation, one with retinyl palmitate and two did not specify the form of supplementation. Six studies evaluated colostrum and two included supplementation of children. It was found that supplementation in the puerperium increases the concentrations of serum retinol and breast milk, however, this result was in the short term and was relevant when the previous concentrations of the mother were low. When maternal serum concentrations are adequate, the retinol content in milk does not change, with little relevance for children. Further studies should be performed to evaluate the effect of megadoses supplementation on serum concentrations of children.

Resumo Avaliar o efeito da suplementação de vitamina A, em lactentes e mulheres no pós-parto, nos níveis de retinol sérico e no leite materno. Foram consultadas as bases de dados Medline, PubMed, Lilacs e SciELO. Os descritores utilizados foram: vitamin A, dietary supplement, child, postpartum period, infant e nutrition programs policies. A busca identificou 7432 artigos. Após eliminação da duplicidade e aplicação dos critérios de elegibilidade permaneceram 8 estudos. Todos avaliaram o efeito da suplementação de vitamina A no pós parto imediato, cinco estudos utilizaram a suplementação com retinil palmitato, um com palmitato de retinila e dois não especificaram a forma de suplementação. Seis estudos avaliaram o colostro e dois incluíram a suplementação de crianças. Encontrou-se que a suplementação no puerpério aumenta as concentrações de retinol sérico e do leite materno, no entanto, este resultado foi a curto prazo e foi relevante quando as concentrações prévias da mãe eram baixas. Quando as concentrações séricas maternas encontram-se adequadas, pouco se altera o teor de retinol no leite, tendo pouco relevância para as crianças. Mais estudos devem ser realizados para avaliar o efeito da suplementação com megadoses nas concentrações séricas de crianças.

Assuntos

RESUMO

BACKGROUND: The aim of the present study was to analyse the effects of placebo on bench throw performance in Paralympic weightlifting athletes. METHODS: The study involved four Paralympic weightlifting male athletes (age: 40.25 ± 9.91 years, weight: 60.5 ± 8.29 kg, height: 1.60 ± 0.15 m) that visited the laboratory in three occasions, separated by 72 h. In the first session, the athletes were tested for bench press one repetition maximum (1RM). The other two sessions were performed in a randomized counter-balanced order and involved bench throw tests performed either after taking placebo while being informed that the capsule contained caffeine or without taking any substance (control). The bench throw tests were performed with loads corresponding to 50, 60, 70 and 80% of the bench press 1RM. RESULTS: According to the results, mean velocity (∆: 0.08 m/s, ES 0.36, p < 0.05) and mean propulsive velocity (∆: 0.11 m/s, ES 0.49, p < 0.05) at 50% of 1RM were significantly higher during placebo than control (p < 0.05). However, there were no difference between control and placebo for 60, 70 and 80% of 1RM (p > 0.05). CONCLUSION: Our results suggest that placebo intake, when the athletes were informed they were taking caffeine, might be an efficient strategy to improve the performance of explosive movements in Paralympic weightlifting athletes when using low-loads. This brings the possibility of using placebo in order to increase performance, which might reduce the risks associated with ergogenic aids, such as side-effects and positive doping testing.

Assuntos

RESUMO

ABSTRACT The release of wastewater and the shrimp feed cost are the main challenges faced by the shrimp farming industry. An alternative solution to both problems is biofloc production in a unit external to the farm, in an activated sludge system for effluent treatment. The treatment system's influent was composed of the shrimp farm wastewater supplemented with urea and sugarcane molasses. The results show that the average removal of chemical oxygen demand was 71% and the average biofloc production in the reactor was approximately 1.5g.L-1. Adding molasses to the influent contributed to the increase in the quantity and diversity of existing microorganisms that are beneficial to cultured shrimp. The mass balance of nitrogen compounds confirmed that nitrification occurred in the system. Therefore, the use of the activated sludge system is a viable and environmentally suitable alternative to produce bioflocs and shrimp farming effluent treatment.

RESUMO A geração de efluentes e o custo com a alimentação do camarão são os principais desafios enfrentados pela carcinicultura. Uma solução conjunta para ambos os problemas é a produção de bioflocos em um sistema de lodo ativado para tratamento de efluentes. Neste trabalho, o afluente ao sistema estudado era composto pelas águas residuais do cultivo de camarão suplementadas com ureia e melaço de cana-de-açúcar. Os resultados mostraram que a remoção média de demanda química de oxigênio foi de 71% e a produção média de bioflocos no reator foi de aproximadamente 1,5 g.L-1. A adição de melaço ao afluente contribuiu para o aumento da quantidade e da diversidade de microrganismos benéficos para a produção de camarão. Houve remoção de amônia e nitrificação confirmada pelo balanço de massa. Portanto, a utilização do sistema de lodos ativados é uma alternativa viável e ambientalmente adequada para produzir bioflocos e tratar efluentes de cultivo de camarão.

RESUMO

Alzheimer's disease corresponds to 50­70% of all dementia syndromes, classified as a progressive neurodegenerative disease showing diffuse cortical atrophy with three stages of evolution: mild, moderate, and severe. Behavioral symptoms and memory loss are major manifestations of the disease. Non-pharmacological interventions are essential to improve the quality of life of these patients. Interdisciplinary assistance is essential throughout the disease course. Regarding nutrition for patients with Alzheimer's disease, weight loss and behavioral changes related to food are major objects of scientific study, as they trigger deterioration of the quality of life of patients and caregivers. Knowing which nutritional guidelines should be used helps in clinical decisions. The study of nutrition in dementia is, therefore, critical for patient management.

Assuntos