Oral delivery creates a slower absorption profile with sustained but lower peak concentrations, which may reduce the need for daily dosing as the compound remains bioavailable for extended periods
Use creates compliance and eligibility risks in tested competitions
A 2022 study in Diabetes, Obesity and Metabolism showed that NNMTi treatment combined with reduced-calorie diet "promoted dramatic whole-body adiposity and weight loss in diet-induced obese mice, rapidly normalizing" weight parameters
However, pernicious anemia, in which the body is unable to properly absorb B12, affects some people
Strategies to minimize reactions include rotating injection sites consistently to avoid repeated trauma to the same area, ensuring the solution is at room temperature before injection (cold injections can increase irritation), injecting slowly rather than quickly, and using a smaller gauge needle for less tissue trauma
Cyanocobalamin is the most widely used form of vitamin B 12 , and has hematopoietic activity apparently identical to that of the antianemia factor in purified liver extract