A Yogurt a Day Keeps the Runs Away

In the 1970s, Dannon ran an ad that featured ancient yet appealing Russian villagers—robust men with full white beards, strong and sturdy women who had aged with grace and dignity. Their secret, of course, was eating lots of yogurt. While I don’t think my daily yogurt will have me doing Russian dances on tables, a new study suggests that it may prevent the development of a real problem for many people—diarrhea caused by taking antibiotics.