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The rationale for stacking GHK-Cu vs NAD+ together is additive rather than synergistic: GHK-Cu handles structural repair while NAD+ handles bioenergetics

Boosts collagen production One of the most prominent benefits of GHK-Cu is its ability to stimulate fibroblasts to produce collagen, up to 70% in some studies

BPC-157 Peptide for Tissue Repair and Cellular Studies BPC-157 comes from a protective protein in gastric juices

Brandt, D.A

For example, patients may continue using retinoids, antioxidants, or hair growth medications alongside peptides

Peptide Sciences Alternative After Peptide Sciences shut down in March 2026, Pepta Labs carries the same research compounds with third-party COAs