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Collagen peptide, an enzymatic hydrolysis product of collagen, contains sequences such as Gly-Pro-Hyp and supports cell adhesion to promote cell proliferation and migration, thus accelerating wound healing (FahmyGarcia et al., 2018)

Going by a family member who had severe side effects though not bleeding but did affect her whole body plus sensitivity to light she has since been under the eye hospital .We think it was the case she was given to much B12.I would speak to your GP hopefully you might get some answers

Functional self-assembling peptide nanofiber hydrogels designed for nerve degeneration

Collagen Remodeling & Structural Refinement GHK-Cu activates gene pathways involved in collagen synthesis, elastin production, and extracellular matrix organization