Vitamins & Minerals
Vitamin B12
Order a vitamin B12 blood test in Texas with Labcorp collection. See current pricing, preparation guidance, and what B12 testing can tell you.
What is included?
About this test
Vitamin B12 testing.
What can this test tell me?
This test measures vitamin B12, a nutrient needed for healthy blood cells and nerve function. A clinician may use it when evaluating suspected deficiency, certain types of anemia, tingling or numbness, or risk factors for poor absorption.
How should I prepare?
Tell the ordering clinician about vitamins, supplements and any B12 treatment. Follow your order instructions about fasting and medication or supplement timing; do not change prescribed treatment on your own.
Common questions
Does this measure all B vitamins?
No. This listing measures vitamin B12 only. Folate and other B vitamins are separate tests unless specifically included in another panel you order.
Is this an at-home B12 test kit?
No. You order online, then take your requisition to a participating Labcorp collection location. This purchase does not include a home collection kit.
Will this explain why I feel tired?
B12 deficiency is one possible cause of fatigue, but fatigue has many causes. This result should be interpreted with your symptoms and medical history rather than used as a complete fatigue evaluation.
Collection and results
Collection is currently through participating Labcorp locations only. Wait for your requisition and collection instructions before visiting. Results are delivered through an approved communication method; timing depends on the tests ordered. Contact Rios Click Labs if you need help with result access.
Ordering labs in Houston · Find a collection location
How it works
- Add this test or panel to your cart and complete checkout online.
- Rios Click Labs / Rios Healthcare reviews and processes your order.
- You receive collection instructions before visiting a participating Labcorp location. Collection is currently through Labcorp only.
- Your results are returned through an approved communication method.
Lab testing does not replace emergency care, diagnosis, treatment, or ongoing medical management. If you have urgent symptoms or a medical emergency, seek prompt medical care.