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In the central nervous system, glycine functions as a neurotransmitter with dual properties
Injections have better bioavailability than oral supplements as they bypass the digestive system completely, providing a direct supply of B12 into the bloodstream to fuel your body
Body-weight scaling from rat data (roughly 10 mcg per kg) is often cited but remains speculative for humans
Leyrat, J
B12 tablets are generally well-tolerated with minimal side effects
Side effect profiles Some data suggests men may experience slightly lower rates of nausea during escalation, though this difference is modest and doesn't warrant different starting doses
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