Ray wrote recently in one of his newsletters about Histone Deacetylase (HDAC) inhibitors and their role in protecting from cancer. Niacinamide is one well-known HDAC inhibitor. This study lists some other potential HDAC inhibitor some of which have been mentioned by Peat before but not in regards to their HDAC role.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2737738/
"...Other dietary agents such as butyrate, biotin, lipoic acid, garlic organosulfur compounds, and metabolites of vitamin E have structural features compatible with HDAC inhibition."
"...Molecular modeling studies with other dietary compounds, such as biotin, α-lipoic acid, and metabolites of vitamin E and conjugated linoleic acids, also provided support for their role as putative HDAC inhibitors."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2737738/
"...Other dietary agents such as butyrate, biotin, lipoic acid, garlic organosulfur compounds, and metabolites of vitamin E have structural features compatible with HDAC inhibition."
"...Molecular modeling studies with other dietary compounds, such as biotin, α-lipoic acid, and metabolites of vitamin E and conjugated linoleic acids, also provided support for their role as putative HDAC inhibitors."