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Second, it stimulates vascular endothelial growth factor (VEGF), promoting the formation of new blood vessels around damaged tissue
In many research discussions, GHK-Cu vs BPC-157 comes down to whether the target is more superficial and collagen-driven, or more structural and musculoskeletal

Flags theoretical pathologic angiogenesis potential: PMC12446177 Evidence Summary Preclinical: IBD/colitis models: High remission rates, restored mucosal architecture, improved barrier function Tendon repair: Accelerated healing, improved tensile strength, reduced fibrosis Neurovascular: Sciatic nerve protection, enhanced blood vessel growth in nerve tissue Human data (emerging): Interstitial cystitis pilot (2024, n=12): 10/12 complete resolution, 2/12 at 80% improvement IV safety study (2025, n=2): no adverse effects on cardiac, hepatic, renal, or glucose biomarkers Knee pain retrospective (2021, n=17): 91.6% reported significant improvement No large-scale controlled trials published Safety: No immunosuppression or hormonal disruption in available data 2025 systematic review (HSS Journal): recommends caution due to limited high-quality clinical evidence 2025 narrative review: flags theoretical pathologic angiogenesis risk Stable in gastric acid (oral administration viable) No observed toxicity at therapeutic doses in published reports Foundational Reviews Sikiric P, Seiwerth S, et al
