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Help protecting cells from free radical damage*
doi:10.1074/jbc.M109.067017, PMID: 20498365 Tavazzi B, Amorini AM, Fazzina G, Di Pierro D, Tuttobene M, Giardina B, Lazzarino G (2001) Oxidative stress induces impairment of human erythrocyte energy metabolism through the oxygen radical-mediated direct activation of AMP-deaminase
Anthony Rossi, a board certified dermatologist in New York City, says that a concentration of greater than 10 percent is needed for better absorption but more than 20 percent is just unnecessary and could possibly cause irritation
For most people, this means eating very little