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Vitamin B12 injections What is vitamin B12

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The evidence is unclear or shows little to no benefit from using B12 supplementation, but more research is needed in these areas

The recommended daily intake (RDI) of vitamin B12 is 6 micrograms per day

This same commitment to quality extends across our full collection of peptides, ensuring that every project, from neurological to metabolic research, is built on a bedrock of purity

However, as Moncrieff and colleagues point out in an attractive systemic review, there is no convincing evidence that depression could be associated with or caused by lower serotonin concentrations or activity [94]