human 58 Article 45 Humans 45 male 43 female 40 controlled study 36 dietary supplement 33 adult 32 Dietary Supplements 30 Female 26 Male 25 nonhuman 23 diet supplementation 20 drug effect 18 Animals 17 animal experiment 16 metabolism 16 Antioxidants 15 vitamin supplementation 15 middle aged 14 aged 13 animal 13 physiology 12 supplementation 12 vitamin D 12 alpha tocopherol 11 article 11 unclassified drug 11 vitamin 11 Aged 10