# Vitamin B12 Deficiency Cascade

> This test measures the amount of Vitamin B12 in your blood and may automatically check a substance called methylmalonic acid (MMA) if your initial results are unclear. It helps determine if your body has enough B12 to support healthy nerve and blood cells, which is important if you are experiencing fatigue or tingling in your hands and feet.

- Labcorp code: 141503
- Category: [Nutrients](https://picardo.health/labs/tests/nutrients.md)
- Sample: blood
- Labcorp turnaround: 1–2 days
- Collection: free at a Labcorp location, or $75.00 at home.
- Without a doctor: yes. People order it themselves, with no doctor's visit or referral.
- Price: shown on the review page its order link opens. Opening it orders nothing.
- Order link: https://app.picardo.health/labs/order?tests=141503&ref=assistant

## About ordering

People order for themselves, with no doctor's visit or referral, and results arrive in their Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.