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Your body already makes peptides
Conversions of prostaglandin endoperoxides by glutathione-S-transferases and serum [PMID: 1009099] Laboratory literature summary: Conversions of prostaglandin endoperoxides by glutathione-S-transferases and serum albumins
Liu M, Liang Y, Chigurupati S, Lathia JD, Pletnikov M, Sun Z, et al
If you are using copper peptide products as directed, copper toxicity is not a realistic concern
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