Vitamin B12 blood test in Tirupati
A Vitamin B12 blood test measures the active concentration of cobalamin in the bloodstream. Low B12 causes numbness, tingling in the feet, balance problems, memory fog, and megaloblastic anaemia. It is particularly common in strict vegetarians and patients taking metformin for type 2 diabetes. Available at Nareddy Care Hospitals in Tirupati with physician consultation.
What do Vitamin B12 results mean?
Levels below 200 pg/mL confirm significant deficiency requiring therapeutic oral supplements or injectable B12. Patients with borderline levels (200–300 pg/mL) and neurological symptoms also benefit from replacement.
Who should get an Vitamin B12 test?
- All patients taking metformin tablets for type 2 diabetes (annually)
- Anyone experiencing tingling, burning, numbness, or pins-and-needles in the feet
- Strict vegetarians or vegans who do not consume animal or fortified foods
- Individuals with unrefreshing sleep, chronic fatigue, memory fog, or unsteadiness
How to prepare
An overnight fast of 6 to 8 hours is preferred. Avoid taking B-complex vitamins or multivitamins for 48 hours before testing, as supplements can falsely elevate the blood reading.
Questions people ask
Why should metformin users get their B12 checked?
Long-term metformin reduces intestinal absorption of vitamin B12 in up to 30% of patients. An annual check detects this before permanent nerve damage occurs.
Can low B12 cause permanent nerve damage?
If left untreated for years, severe B12 deficiency can cause irreversible spinal cord and peripheral nerve damage. Early replacement cures tingling and protects nerves completely.
How is low vitamin B12 treated?
Mild deficiency is treated with high-dose oral methylcobalamin tablets. Severe deficiency or neurological weakness is treated with a short course of gentle intramuscular injections.