can i use ghk cu with tretinoin GHK-Cu/Estriol/Niacinamide/Tretinoin Does the use of Glycine-Histidine-Lysine

This product is provided in lyophilised (freeze-dried) form, with a total content of 40mg per vial , to support stability during storage, handling, and transport under appropriate laboratory conditions

The product sold by clinics is a synthetic 15-amino-acid peptide manufactured by "solid-phase synthesis", administered under the skin, into the muscle or a joint, or intravenously, often at higher doses for weeks

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Vitamin B12 exists in several forms and contains the mineral cobalt [1-4], so compounds with vitamin B12 activity are collectively called cobalamins