http://www.notadoc.org/node/110Towards the bottom he says B6 is destroyed when meat is cooked. I don't believe in supplements, as studies show they often do more damage than good. Example, folic acid supplementation increases risk of prostate cancer by a factor of 3. American wheat products usually have folic acid added.
"Tryptophan metabolism requires heightened levels of pyridoxine (vitamin B6). The highest sources of tryptophan are animal sources. Yet the form of pyridoxine found in meat is very unstable to heat unlike the form of pyridoxine found in non-meat sources."
Not saying I agree with the site or the author in general, I have not read beyond this one article. Meat sources are the best source of B6.
