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A 2020 study found that high blood concentrations of vitamin B12 may be linked to an increased risk of all-cause mortalityyikes (8)

We recommend using [Bacteriostatic Water]( for reconstituting both peptides as it contains a preservative that inhibits bacterial growth

J Biol Response Mod

Biological Role of Vitamin B12 Helps make red blood cells Prevents certain types of anemia Keeps nerves protected Supports memory and focus Helps turn food into energy B12 deficiency may lead to fatigue, shortness of breath, nerve damage, memory impairment, mood changes, and irreversible neurological complications if untreated

Thus, it must act within the gut-brain axis, regardless of whether this action is direct or indirect