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Whether its effects on cognitive aging depend on delivery route or exposure duration remains unclear
Peptide bioregulators are sometimes analysed in the literature across various routes of administration, and intranasal administration is sometimes considered as a route that bypasses the gastrointestinal tract

1 2 "Multifunctionality and Possible Medical Application of the BPC 157 Peptide-Literature and Patent Review"

This phenomenon seems to be promoted by supplementation with high doses of vitamin B12 or its long-term use [106]
Are vitamin B12 injections painful
