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Free Radic Biol Med 1999

Although one thought may be through the upregulation of neurotransmitters in which are directly correlated with Testosterone, specifically dopamine

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Several studies have found this anaphylaxis-like reaction to occur more often in people given intravenous acetylcysteine despite serum levels of paracetamol not high enough to be considered toxic

This suggests a potential synergistic action between GHK-Cu and HA, specifically in enhancing collagen IV levels