EllieMD Glutathione Injection A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue Amazon.com : AzulBotanicals Copper Peptide GHk Cu & Methylene Blue Infused Whipped Grass Fed Tallow Balm, Fine lines, Wrinkles, Eczema, Acne, Full body Moisturizer, For All Skin (3.4 oz) : Beauty & Personal Optimal Glutathione IV Dosage & Detox Benefits in Los Angeles The Power of Blue: Why GHK Cu Is the Unsung Hero of Youth Let's talk about the blue magic no one's talking enough about GHK Cu peptide (that gorgeous blue serum you've