the benefits of vitamin b12 injections — Ugly London. Acupuncture & Chinese Herbal Medicine b12 supplement vs injection Vitamin
Description
It takes Nicotinamide (the raw material for NAD+) and methylates it, effectively removing it from the salvage loop
Food Nutr Bull

If serum B12 is borderline or normal but suspicion remains, check MMA (methylmalonic acid) and homocysteine levels

One of the primary benefits is its impact on energy levels