In B12 deficiency, DNA synthesis in red blood cell precursors (erythroblasts) can be impaired, preventing the normal maturation and division of these cells, resulting in larger-than-normal red blood cells
Many users notice relief from fatigue, sharper focus, and improved metabolism within weeks
However, by doing your due diligence on it, you can help maximize the benefits while also avoiding any unwanted side effects if and when you decide to take it
Reported or plausible effects based on mechanism and user reports may include headache, nausea, stomach upset, appetite changes, fatigue, dizziness, or sleep disruption
Potential Side Effects and Safety Considerations Vitamin B12 injections are generally well-tolerated with an excellent safety profile when administered appropriately