does b12 have to be injected intramuscular How I perform a glute Injection (Intramuscular Injection) what part of the body

Patients with vitamin B12 deficiency and concurrent renal or hepatic disease may require increased doses or more frequent administration of methylcobalamin

Its history began with a breakthrough by a research team at the University of Texas, USA, in 2017.At that time, NNMT was recognized as a key enzyme in cellular metabolism and energy homeostasis, highly active in adipose tissue and closely linked to obesity, type 2 diabetes, and other metabolic diseases

That role is real and well described in biochemistry

Evidence type: Human RCT | Observational | Animal | In vitro | Regulatory Mechanism of Action AOD-9604 mimics the fat-metabolizing region of growth hormone