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Vitamin B-12 is an essential vitamin and micronutrient, not a peptide compound
Vitamin B12 deficiency has been linked to extreme tiredness lack or energy cancer cardiovascular disease, dementia decline in cognitive function nervous system damage anaemia mouth ulcers mental health conditions visual problems
The CT ratio of individual genes is shown for each condition
PMID: 31158953
Many are available only as injections or come from suppliers with limited transparency
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