This is because vitamin B12 plays an important role in helping your cells use nutrients and perform metabolic functions
Suskind, and Christopher J
Damin MR, Cortes-Perez NG, Quintana ET, Ortiz-Moreno A, Garfias Noguez C, Cruceo-Casarrubias CE, Snchez Pardo ME, Bermdez-Humarn LG (2022) Functional foods, nutraceuticals and probiotics: a focus on human health
You need a pharmaceutical-grade version from a legitimate compounding pharmacy or verified research supplier to make this work
For laboratory research use only not for human consumption.
And you dont have to visit a health care provider anymore, you can buy B12 injections online through companies like Hone