See what others have said Shannon A: "Very, very helpful whatever practice you are trying to set up
The characteristic blue colour of copper peptide solutions is a useful indicator - if it's turned brown or green, the peptide has oxidised
Besides that, the product is great and I would highly recommend
Zalipsky S, Qazen M, Walker JA, Mullah N, Quinn YP, Huang SK
By inhibiting the enzyme tyrosinase, glutathione reduces melanin production, helping to diminish hyperpigmentation, dark spots, and even skin tone
Injectable glutathion is considered safe when it is performed by a certified dermatologist