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Both are copper tripeptides, but AHK-Cu uses alanine as its first amino acid while GHK-Cu uses glycine

This water-soluble powerhouse doesn't just give injectable B12 its distinctive ruby color (thanks to the cobalt it contains) it's actually working behind the scenes in nearly every cell of your body

[76] Ruminants, such as cows and sheep, are foregut fermenters, meaning that plant food undergoes microbial fermentation in the rumen before entering the true stomach (abomasum), thus allowing them to absorb the vitamin B 12 produced by the bacteria

Intravenous Administration The way B12 injections are given, either intramuscularly or intravenously, affects how well they work

PMID 11935176