how much b12 should a human take via injection Vitamin Dose for Adults: 7 Dosage Facts How Long Does It Take
Description
Other tests may include evaluating gastric health, checking for parasites or bacterial overgrowth in the intestines, and assessing genetic factors that affect vitamin B12 absorption

Individuals over 50, you likely need supplemental B12

However, if vitamin B 12 deficiency is the cause, it will persist despite the resolution of the anemia

Dengue virus-induced autophagy regulates lipid metabolism
What Happens During B12 Injections

However, because folate, riboflavin, and vitamin B-6 deficiencies result in elevations of tHcy, as do renal insufficiency and hypothyroidism, it is not a specific biomarker for B12 status especially in populations with poor micronutrient status
