According to recently presented research, participants who took more than the daily prescribed doses of certain supplements including beta carotene, folic acid, and vitamin E showed a higher risk of cancer and other health issues in some cases.

According to a review presented at the American Association for Cancer Research annual meeting, taking a higher than recommended dose of daily dietary supplements could result in a greater risk of cancer.

The research included reviews of several long running trials.  In one, consuming beta carotene supplements in combination with vitamin A may have led to an increased chance of lung cancer and heart disease. 

Too much vitamin E and selenium also appear