| Name | Info | Provider | Link |
|---|---|---|---|
| Vitamin C | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitaminc.html |
| free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21735345/ | |
| subscription/membership/fee required | Springer | https://dx.doi.org/10.1208/s12249-011-9659-1 | |
| free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/21735345 |