Vitamin B12

Test Overview

Key Aspects of Vitamin B12:
Functions: Supports energy metabolism, brain function, and nerve cell maintenance.
Deficiency Symptoms: Fatigue, weakness, pale skin, numbness/tingling in hands and feet, dizziness, and cognitive issues (memory loss, depression).
Causes of Deficiency: Poor diet (especially for vegetarians/vegans), pernicious anemia (lack of intrinsic factor), gastrointestinal issues, and medications like metformin or long-term antacid use.
Sources: Primarily animal-based: beef, liver, chicken, fish, shellfish, eggs, and dairy. Fortified sources include cereals and nutritional yeast.

What's Included

Test Information