Multivitamins increase the risk of cancer and heart disease, according to recent studies.
Men who took a daily MV or MVM had a 2% higher overall risk of cancer, including a 3% higher risk of prostate cancer, 8% higher risk of lung cancer, and a 16% higher risk of leukemia (which increased to 26% higher if they took more than one MV or MVM daily).
Among women, taking a daily MV or MVM did not affect their overall risk of developing cancer except for oropharyngeal cancer, which increased by 46%. Women who took more than one MV or MVM daily had a 53% higher risk of oropharyngeal cancer but a 35% lower risk of leukemia.