BPC 157 vs. TB 500: Which One Actually Works? Dr. McKenna's Orthopedics and Biologics Texas Peptide side effects no one talks about BPC 157 headaches. TB 500 fatigue. CJC Ipamorelin water retention. Most people quit. But 90% of the time it's the protocol, not the peptide. GLOW: BPC 157 TB 500 GHK Cu Blend The Aesthetics Co. The KLOW peptide stack is a four peptide research blend combining: GHK Cu for collagen skin and connective tissue pathways, BPC 157 for tissue repair and gut integrity, TB 500 for cell migration and angiogenesis, KPV for