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Following a vegan or vegetarian diet, having gastrointestinal issues, having pernicious anemia, and taking specific drugs are issues that frequently result in a deficiency

Unlike ingredients such as retinol and benzoyl peroxide, which have established pharmaceutical pathways and cosmetic applications, Copper Tripeptide-1 has primarily developed as a GHK-Cu cosmetic ingredient with strong demand in the beauty and personal care industry

PMID 31447084

Unlike oral supplements, which must go through the digestive system and may be poorly absorbed, B12 injections bypass the gastrointestinal tract entirely

This leads to higher absorption and zero emergency bathroom trips during a run