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Objective: Hyaluronic acid (HA) has become a commonly used ingredient in topical moisturizing products; however, limitations of delivery of HA to only the surface of skin have hindered leveraging the full capacity of HA for skin rejuvenation. Here, we aimed to evaluate the clinical benefits of a multi-weight HA plus antioxidant complex-based lotion with SPF 30 compared to a single-weight HA plus ceramide-based lotion with SPF 30. Methods: A double-blind comparative study was conducted on 70 female subjects, aged 25 to 65 years with mild-to-moderate facial dryness and visible fine lines and wrinkles, divided evenly into two groups (n=35 per group). Clinical grading of the face, including dryness, roughness, and fine lines, was assessed after once-daily application for up to eight weeks. Results: Daily use of the multi-weight HA plus antioxidant lotion demonstrated significant improvements in all clinical grading assessments (dryness, roughness, and fine lines) as early as Week 2 compared to baseline. Statistically significant improvements in visible dryness, roughness, and fine lines were greater for the multi-weight HA plus antioxidant lotion compared to the single-weight HA plus ceramide-based lotion. Limitations: The overall small sample size. Conclusion: This study showed the enhanced improvement in dryness, roughness, and fine lines following daily utilization of a novel multi-weight HA plus antioxidant complex-based lotion compared to a single-weight HA plus ceramide-based lotion. These improvements may be attributed to the ability of multi-weight HAs to moisturize the skin surface and penetrate the upper surface layers of the skin, combined with the added benefits of key antioxidants.

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BACKGROUND: We aimed to investigate the effects of 2 ceramide plus natural moisturizing factor-enriched formulations compared to a ceramide-based cream on skin moisturization. METHODS: Two double-blinded comparative studies were conducted, which enrolled 35 (n=29 females, n=6 males) and 33 (n=21 females, n=12 males) participants, respectively. Participants applied ceramide plus natural moisturizer cream or ceramide-based cream (study 1) or applied ceramide plus natural moisturizing factor lotion or ceramide-based cream (study 2) to each of their lower legs for 10 days with a 5-day regression period (no moisturizer applied). Skin hydration by corneometry after bilateral application was conducted once daily for each leg in both groups.   Results: An increase in corneometer units vs baseline for the ceramide plus natural moisturizing factor-enriched cream and natural moisturizing factor-enriched lotion were greater than the increase vs baseline for the ceramide-based cream at days 10 and 15; with an overall statistical significance in favor of the ceramide plus natural moisturizing factor-enriched formulations at day 10.  Conclusions: The marked improvement in skin moisturization following utilization of the ceramide plus natural moisturizing  factor-enriched cream and lotion compared to the ceramide-based cream can be attributed to the inherent properties of the natural moisturizing factors. These properties are known to maintain the humectancy and intercellular lipid membrane of the stratum corneum, which directly improves the permeability barrier function of human skin in reducing transepidermal water loss. J Drugs Dermatol. 2024;23(3):     doi:10.36849/JDD.8172.

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Melasma is a pigmentary disorder characterized by hyperpigmented patchy skin in sun-exposed areas, especially the face. Treatment of melasma can be challenging because long-term therapy is required, reoccurrence is common, and existing therapies are insufficient and unsatisfactory. To investigate new treatment options, we performed an exploratory double-blinded, randomized split-face study to assess the efficacy of the tyrosinase inhibitor Thiamidol compared to hydroquinone in women with mild to moderate melasma. After 12 weeks, modified Melasma Area and Severity Index scores significantly improved on both the Thiamidol-treated and the hydroquinone-treated sides of the face. Additionally, Thiamidol treatment improved modified Melasma Area and Severity Index scores significantly better than hydroquinone, and more subjects improved following treatment with Thiamidol (79%) compared with hydroquinone (61%). During treatment, no subjects displayed worsening of modified Melasma Area and Severity Index scores on the Thiamidol-treated side, while approximately 10% of the subjects showed a worsening of modified Melasma Area and Severity Index scores on the hydroquinone-treated side. All subjects routinely used sunscreens and consistent results were obtained in low and in high UV ambient conditions. Subjects rated the efficacy of the Thiamidol formulation significantly better with regard to overall decreased intensity of dark spots and their overall appearance throughout the study. Thiamidol was well-tolerated and well-perceived and represents an effective agent to reduce hyperpigmentation.

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Prevention of the flares is a main goal in the long-term treatment of atopic dermatitis (AD). Therefore we investigated the efficacy of a water-in-oil emollient, containing licochalcone A, omega-6-fatty acids, ceramide 3 and glycerol, for prevention of the flares in adults with mild to moderately severe AD, treated with topical steroids, that led to clearing of the inflammatory lesions and had been discontinued prior to inclusion. The study was a 12-week, double-blind, randomized, vehicle-controlled, left-right comparison test with the number of relapses, defined as re-occurrence of erythema for at least 3 consecutive days, considered the primary outcome. Compared with the vehicle, the active formulation significantly reduced the number of relapses and maintained the barrier homeostasis of the respective arm. To the best of knowledge, this is the first study to show prevention of the AD flares by the use of stand-alone emollient treatment, based on comparison with the corresponding vehicle while excluding concomitant/rescue medications.

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