Hi Jhan. I believe the link lies within the archives over on Healthyawareness. It was some study that was undertaken a while back and without spending hours trawling through the archives I doubt I could find it. There is also a link again in the archives and discussions that suggests magnesium also can feed yeast - although for me personally mag. has never been a problem. I agree with Johnny - best to go on what works best individually - its just for me 'B' vits cause negative reactions.