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This discomfort is caused by the immune response to the influenza vaccination, which helps the body build protection against the flu virus
Methylcobalamin is often marketed as a 'natural' or 'bioactive' form, though evidence regarding superior efficacy compared to cyanocobalamin remains limited for most people
NNMT consumes S-adenosylmethionine (SAM) as a methyl donor, and inhibiting NNMT could theoretically increase SAM availability for other methylation reactions
Many athletes report feeling more energetic after B12 injections, but this sensation often stems from correcting an unknown mild deficiency rather than the vitamin acting as a performance enhancer
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