vitamin b12 supplement or injection B-12 Injection, 3,000 mcg/mL, 100 mL at Tractor Supply Co Rx only Sold in 100 mL Vitamin B12 Injections | B12

Anemia develops from B12 deficiency, as the vitamin is engaged in the production of healthy red blood cells

That means your body needs it to carry out lots of important functions, including (1, 2): Red blood cell formation DNA synthesis Brain and nervous system functioning Energy production (metabolism) Immune system health Risk Factors for Vitamin B12 Deficiency Your body doesnt produce B12 on its own

Before continuing the B12, I would recommend getting your B12 level tested with your doctor

Pareek, A, Suthar M, Rathore G, et al

There is no established tolerable upper intake level (UL), so even high-dose injections are safe because your system simply eliminates what it cannot use