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It also prevents megaloblastic anemia, a debilitating disease responsible for feelings of intense fatigue

Cognitive decline, dementia, and Alzheimer's disease The occurrence of vitamin B 12 deficiency prevails in the elderly population and has been frequently associated with Alzheimer's disease (reviewed in 63, 64)

Oral Supplements: Several factors affect vitamin absorption from oral supplements: Digestive Absorption Limited uptake through the digestive tract First-Pass Metabolism Liver processing reduces available nutrients Individual Variation Genetics, age, and health conditions affect absorption Medication Interactions Some medications reduce vitamin absorption Deficiency Severity Severe deficiencies may require higher doses than oral can provide How Vitamin Injection Therapy Works Vitamin injections are provided as part of comprehensive nutritional wellness programs that address deficiencies, support optimal function, and enhance overall health

Doctors decide on B12 injections based on a full check-up and lab tests to confirm the deficiency

Mecobalamin: Uses, interactions, mechanism of action | DrugBank Online