| Name | Info | Provider | Link |
|---|---|---|---|
| Vitamin E | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitamine.html |
| free resource | NCI CPTC Antibody Characterization Program | https://antibodies.cancer.gov/detail/CPTC-TAPBP-1 | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/42.3.432 |