what amount should b12 injection be Cyanocobalamin (B12) 1000 mcg/mL, Multiple Dose Vial 30 mL Methylcobalamin Injection (Vitamin B12) |

The compounds have been found in dietary supplements and products marked as "research only", creating exposure risk for athletes who may purchase such products for cognitive benefits without understanding they're consuming prohibited substances with no established safety profile

Megaloblastic anemia is characterized by enlarged red blood cell precursors with asynchronous maturation of the nucleus and cytoplasm

Severe vitamin B 12 deficiency in a mouse model showed dramatic alterations in the level of DNA methylation in the brain, which might lead to neurologic impairments (103)

In their review, Doets et al

Vitamin B12 is primarily found in animal-based foods, including beef, salmon, yogurt, and milk, though some plant-based foods, like nutritional yeast, are fortified with it