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The main practical cautions are its blue-green color (which can tint formulations) and formulation incompatibility with certain other actives notably strong direct-acid vitamin C and high concentrations of exfoliating acids, which can destabilize the copper complex

4 Moreover, females exhibit a biologically distinct metabolic context from males, shaped by sex-specific physiological programs, including pregnancy and lactation, which involve profound shifts in lipid metabolism and carnitine demand, 8 which remain largely unexplored

Green tea extract contains natural antioxidants and the compound EGCG, which helps to make fat metabolism even more efficient

JAMA 321 , 13911399 (2019)