This is an excerpt from a research article I read this week about ALA. I posted this on the "Natural Supplements" page, but thought it might be better answered here since the other thread was old.
"Alpha lipoic acid is a naturally occurring nutrient found at low levels in green leafy vegetables, potatoes and meats, especially organ meats such as kidney, heart or liver. The amounts used in this research would not be obtainable by any normal diet, researchers said, and for human consumption might equate to supplements of about 2,000 milligrams per day. Even at low, normal, dietary levels, the compound can play a key role in energy metabolism. "
I have been taking 200mg of R-ALA for months, but cannot figure out how to translate the 2000mg amount done in the research into R-ALA. The research definitely shows reasons to take this supplement.