Medical workers commonly use U-100 insulin, where 1 ml of insulin contains 100 units
However, they are easier to use
This product is not a drug, food, or cosmetic and may not be misbranded, misused or mislabeled as a drug
Biochim Biophys Acta 1830:330416 Markovic J, Mora NJ, Broseta AM, Gimeno A, de-la Concepcin N, Vina J, Pallardo FV (2009) The depletion of nuclear glutathione impairs cell proliferation in 3 t3 fibroblasts
PLU Laboratories' copper peptides for skin work by delivering clinical-concentrations of GHK-Cu directly to your skin, without any dilution from Vitamin C, hyaluronic acid, or botanical extracts
Ive found great quality products, like the ones I found at Ion peptides, that provide these ingredients for topical application