David A. Mark

Articles

Less may be more when it comes to melatonin as a sleep supplement.

Cognitive Health, Dietary Supplements, and Sleep: Melatonin 

There was a period when European civilization existed without any access to caffeine-no coffee, no tea, and no cocoa. This era was known as the Dark Ages.

Caffeine and Energy Drinks: Consumption and Safety

What can’t you say about a dietary supplement? For one, you can’t say that it works, even if it works, until FDA says you can say it works.

Dietary Supplements and Biomarkers: What Constitutes Evidence?

Clinical evidence clearly supports the health benefits of polyphenols-but not because they act as antioxidants.