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Athletes, Coaches, Health Professionals, and Support Personnel Additional Prohibited List Information Athlete Guide to Anti-Doping A directory of articles written by USADA, covering many substances and methods listed in The Prohibited List

Patients receiving B12 injections should inform their healthcare provider of all medications, as certain drugs (including metformin, proton pump inhibitors, and chloramphenicol) can affect B12 absorption or metabolism

B12 injection kits can be effective when administered correctly, but professional injections offer expert oversight and monitoring

Additional research has focused on the relationship between NNMT activity and nicotinamide metabolism, methyl donor utilization, and cellular signaling networks associated with energy balance