Posted by JLx on October 12, 2004, at 13:05:30
In reply to Re: B Vitamins question » mcp, posted by Simus on October 12, 2004, at 8:42:29
I ran across this recently and it really gave me pause:
"the nutrition industry has failed to heed the warning that damage may be caused by high doses of riboflavin supplements.
As always, the dose makes the poison, and this means that if you take nutritional supplements you should make sure you consume an adequate amount of riboflavin daily, rather than an excess of riboflavin.
The human requirement for riboflavin is less than 2 milligrams a day, but many common vitamin supplements contain 10s or 100s of milligrams. There is little (if any) scientific justification for taking supplements of riboflavin greatly in excess of the known dietary requirement. However, there is a lot of scientific evidence and speculation that the combination of abnormally high blood, eye and skin levels of riboflavin, combined with a lifetime of sun exposure, may have serious negative consequences, and actually cause the damage we are trying to prevent. The combination of sunlight and abnormally high tissue levels of riboflavin from excess supplementation is a toxic combination that should be avoided."
http://www.townsendletter.com/June2003/riboflavin0603.htm
poster:JLx
thread:401626
URL: http://www.dr-bob.org/babble/alter/20040928/msgs/402166.html