Alicia Silverstone, 24, has contacted the Federal Trade Commission, asking that the agency look into health claims made in the dairy industry's popular ad campaign featuring stars sporting white milk mustaches, reports the Associated Press. "I recently stopped consuming dairy products, in part because of all the information I learned about the harmful effects of cow's milk on human health," said the "Clueless" star's letter. She reportedly fears that milk leads to obesity and heart disease.