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Choline (25-50 mg per mL): an essential nutrient involved in fat metabolism, liver function, and neurotransmitter synthesis
That enzyme is NNMT, nicotinamide N-methyltransferase
Adjustments are made based on how the patient responds
The Blood Project (2025 review)
The usual dose for vitamin B12 injections is 1000 mcg (1 mg), given by injection
However, the research authors emphasize that this does not indicate the shots can help a person lose weight, as there is no proof that a causal relationship exists
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