Some substances in food, such as avidin in raw eggs (which binds the vitamin biotin), may alter the absorption of vitamins or drugs. For this reason, DRIs for vitamins and minerals are based on _____ and would have to be adjusted for exceptions.

3000+ review questions on anatomy and physiology. 

Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.