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[DOI] [PMC free article] [PubMed] [Google Scholar] Ahn B

Fish collagen peptides can promote hair growth, reduce breakage, and enhance overall health by providing the building blocks necessary for healthy hair follicles and shafts

For example, some release only tryptase, and others only chymase (both along with histamine, IL-6, TNF-alpha, prostaglandins, etc.).[ref] Allergens and pathogens cross-link with IgE and activate mast cells

In particular, elevated blood lactate and pyruvate levels have been reported in up to 76% of individuals with autism [92]

For 5A1MQ, oral works fine so the case for going sub q is much weaker than it is for actual peptides