vitamin b12 nasal spray vs injection Injection: Benefits and Dosage Explained Comparison of the Efficacy of

Individuals following strict vegan or vegetarian diet are also at a higher risk of B12 deficiency because plant-based diets typically lack sufficient B12

Determinants of plasma methylmalonic acid in a large population: implications for assessment of vitamin B12 status

Finally, pernicious anemia is an autoimmune disease that affects B12 absorption and can result in a deficiency of this vital nutrient

B12 (typically cyanocobalamin or methylcobalamin) is placed directly into the muscle, so it is reliably absorbed into the bloodstream and carried to the cells that need it

Research gaps and clinical common sense Direct trials measuring exactly how much alcohol or exercise worsens post-injection bruising are rare