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However, keep in mind: Always patch test new products, especially if you have sensitive or allergy-prone skin Discontinue use if you notice redness, itching, or rash Pregnant or breastfeeding
Int J Tryptophan Res
6 Clinical / topical cosmetic studies (PubMed)Topical copper-peptide trials for skin firmness, fine lines and photoaging the bulk of human GHK-Cu evidence
Further, for poorly water-soluble drugs and biopharmaceuticals, such as proteins and peptides, powder formulations facilitate the formulation of larger drug doses by co-formulating using excipients that act as bulking agents (water-soluble fillers: lactose, trehalose, mannitol, and sorbitol
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