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Reviews of NNMT biology have explored its involvement in metabolic regulation, nicotinamide metabolism and broader cellular biochemical pathways (Liu et al., 2021)
The short answerit can vary by individual, but many people begin feeling noticeable effects within hours or days
Unlike some vitamins, B12 can be stored in the liver for an extended period, sometimes taking years for a deficiency to manifest
Individuals with Poor Absorption: People with low stomach acid, or those who have had certain surgeries (like gastric bypass), may struggle to absorb B12 from food and would benefit from injections
The human body cannot produce vitamin B12
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