New to diet/info on brewers yeast

[Guest guest]

I am new to the GF/CF diet. My son has been on it approx. 2 months.

I was recently told that he needs to also remove any products that

contain brewers yeast. I was told that includes all forms of

vinegars. Is this true? If anyone knows where I can get facts on

this form of yeast and what foods to avoid I would appreciate it.