Image by David Richfield from Wikipedia Too much of anything can be harmful... even vitamins which people seem to consider benign regardless of how much is taken. In fact, taking regular large doses of vitamins (greater than 150% of what is recommended per day) actually INCREASES the risk of cancer. To be clear, vitamins and supplements are great, but only when taking the recommended daily amount in a normal, healthy individual. Supplements may be necessary only if there's a deficie…