vitamin b12 injections and blood clots 8 Reasons to Get a Shot at Texas Heart & Vein Today: Texas Heart Vein Multispecialty Group: Cardiovascular Doctors B12 INJECTION - Elite IV
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But, if you have a severe or chronic vitamin B12 deficiency, you may need repeated shots until the levels are replenished, followed by occasional maintenance shots

If you are concerned about your own health, maybe you have some of the symptoms of vitamin B12 deficiency, you can book into Medcare for a blood test to check your level of vitamin B12 and folate

NNMT depletes the NAD+ precursor pool by methylating nicotinamide the same nicotinamide that the salvage pathway would otherwise convert back into NAD+ via the enzyme NAMPT
R Core Team (2023)

They work primarily by suppressing appetite and slowing gastric emptying
Chronic treatment should be with an oral B12 preparation