Legality varies by jurisdiction and intended use
Acta Neuropathologica 128 (2): 247266
They are two different classes of molecule with two different mechanisms and two different evidence trails, one of which happens to include a body of human physiological data the other simply doesnt have, owing entirely to the fact that one of them is something the body already makes
This pathway has been explored for its role in reducing visceral fat
For patients who have difficulty absorbing B12 through the digestive tractsuch as those with pernicious anemia, gastrointestinal disorders (like Crohns disease or celiac disease), a history of gastric bypass surgery, or those with severe B12 deficiencyour providers often recommend intramuscular B12 injections
When you're deficient, the symptoms are usually gradual: fatigue, brain fog, low mood, tingling in hands or feet, unexplained weakness