are b12 injections intramuscular Vitamin (Cyanocobalamin Injections) — Mountainside Medical B12 Shots vs. IV Infusions:

Importantly, treatment of DIO mice with our NNMT inhibitors did not impact food intake, but produced marked reductions in body weight, WAT mass, adipocyte size, and cholesterol levels with negligible toxicity or observable adverse effects

Similar to ICARIA-MM, the primary endpoint was PFS

Short-Term Effects (13 Weeks) Reduced fatigue and sluggishness Enhanced mental focus and memory Improved mood and motivation During this period, the body continues to absorb B12, and the cumulative effects become more noticeable

B12 is found in animal-based products, so strict vegetarian or vegan diets don't have many (or perhaps any) sources of Vitamin B12