I thought a beauty peptide would be harder to measure the effects, but Im excited to report noticeable change within the first 2 weeks. Sometimes change happens at a slower pace based on our Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed Sent GLOW, KLOW, and the TB BPC blend to a lab after 30 days refrigerated., 99.6% purity before. 99.6% purity after., Same milligram content. No measurable degradation., These blends are Amazon.com: medicube PDRN Pink Peptide Serum with Salmon DNA Pink Glow Serum with Peptides & Niacinamide for Hydration & Firm Looking Skin Uneven Tone Care Korean Skincare, 1.01 fl. Oz : 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK