Is It a Food, Dietary Supplement, or Drug?

Many foods have drug-like properties. For example, foods with vitamin C (such as citrus fruit) can cure scurvy, the dreaded disease of 17th century sailors; likewise, seafood can cure (thyroid) goiters because seafood represents a source of iodine, almost unique in nature. Most obviously, food can cure malnutrition and starvation, and protein-containing foods are a remedy for kwashiorkor (a protein deficiency disease). Cranberries contain anthocyanins, which help maintain a healthy urinary tract…