TOO MUCH OF A GOOD THING?
In 1912, Casimir Funk, the father of vitamin therapy, advanced the revolutionary idea that certain diseases, like beriberi, could be cured and prevented by curious substances found in foods — what he dubbed vital amines. The discovery was a major achievement in our understanding of health and disease. But if small amounts of vitamins are unquestionably key to good health, is taking high doses better? In the century since Funk’s discovery, megadoses of vitamins and minerals were touted for everything from curing the common cold to protection against cancer. Today, half of all American adults now take supplements regularly, spending $12 billion per year, writes Nina Shapiro, M.D., in “Vitamin Hype” (p 36). Unfortunately, recent studies have found little evidence that taking vitamin and mineral supplements improves longevity or fights disease.…