Part D does not cover B12 injections as vitamins are generally excluded
How Long Does B12 Stay in the Body
Inadequate secretion of intrinsic factor, resulting from lesions that destroy the gastric mucosa (ingestion of corrosives, extensive neoplasia), and a number of conditions associated with a variable degree of gastric atrophy (such as multiple sclerosis, certain endocrine disorders, iron deficiency, and subtotal gastrectomy)
Because of this, using a pill form of the supplement creates an additional step for transferring the B12 into the bloodstream and can cause your body to absorb less of the vitamin
Storage: Store at room temperature
An Epidemic of Too Much Vitamin B12 I started clinical practice over forty years ago, a time when vitamin B12 was considered a cure-all. Many people werent getting enough vitamin B12 from their diet unless they ate organ meats like liver and lots of fish and shellfish