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doi:10.3122/jabfm.2012.06.120084 Zhang W, Xu L, Luo T, Wu F, Zhao B, Li X

Check for proper packaging, lot numbers, and expiration dates
Some practitioners recommend morning injection to align with the body's natural repair cycle

J Endotoxin Res (2000) 6:3837

Lack of FDA approval does not mean lack of activity

Direct interaction of endothelial nitric-oxide synthase and caveolin-1 inhibits synthase activity
