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Many scientist have done studies on copper peptide, and found that it plays a role in inhibiting follicle death and increasing their size

Mild effects may include temporary redness or soreness at the injection site, mild nausea, or brief flushing

Alzahrani TF

As damage from smoking or even pollution accumulates to the respiratory tract and the lungs, oxygen and carbon dioxide (CO2) exchange suffers, making it difficult to breathe

But its been shown over and over that whether youre training for strength or for endurance, as much as those antioxidants might lower the pain, they can also lower the gains (check out this study, this one, this detailed review on antioxidants in resistance training and this great review of antioxidants in endurance training)