organic b12 supplemnt that is for injection USDA Liquid 12 Also helps prevent and treat symptoms associated with a vitamin B B12 Injection | CITIZEN MEDS
Description
That's in addition to, as mentioned by Gambit, excess alcohol causing issues with the liver which is the primary bodily store of B12

1 2 3 "Coronavirus (COVID-19) Update: FDA Authorizes Moderna, Pfizer-BioNTech Bivalent COVID-19 Vaccines for Use as a Booster Dose" (Press release)

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5-Amino-1MQ has shown to inhibit NNMT, preventing Nicotinamide from entering the NAD+ Salvage Pathway and converting into NAD+

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