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B12 and caffeine work through completely different mechanisms B12 supports cellular energy production, while caffeine blocks adenosine receptors to reduce perceived fatigue
Mechanism of Action 5-Amino-1MQ inhibits NNMT, the enzyme that transfers a methyl group from SAM onto nicotinamide
What I mean is the difference between intramuscular B12 injections and Subcutaneous B12 injections
Vitamin B12 injections are often marketed as a way to boost metabolism and aid in fat burning, but the evidence supporting these claims is limited
PMID 15950558
doi:10.1300/J052v24n03_05
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