Re: benefits of niacin - EDIT)

>>Hg in fat cells

http://nature.berkeley.edu/classes/eps2/wisc/hg.html

The most toxic mercury compounds are those that are fat soluble, because this property assists in their distribution throughout the body. Methyl mercury compounds, such as dimethyl mercury, are among the most dangerous. Mercury salts released into the environment may frequently be converted by anaerobic bacteria into such compounds, which can then be carried through the food chain to humans