Vitamin B12
Vitamin B12 keeps your nerves and red blood cells healthy. It comes almost only from animal foods, so vegans, older adults and people taking metformin or acid-reducing drugs are most likely to run low.
Your reading
This app uses 200–900 pg/mL. Values in the low-normal band (roughly 200–300) can still mean a mild deficiency, which doctors sometimes confirm with an extra test (methylmalonic acid). Tingling hands or feet, fatigue and poor memory are typical signs of low B12.
What may help
- —Meat, fish, eggs and dairy, or fortified foods if you eat plant-based
- —A B12 supplement if you're vegan; it's cheap and well-absorbed
- —Asking about absorption if you take metformin or acid-reducing medication long-term
When to talk to a doctor
If B12 is below 200, or low-normal with symptoms like numbness, tingling or memory problems. Nerve damage from low B12 is preventable when caught early.
Common questions
What is Vitamin B12?
Vitamin B12 keeps your nerves and red blood cells healthy. It comes almost only from animal foods, so vegans, older adults and people taking metformin or acid-reducing drugs are most likely to run low.
What is a normal Vitamin B12 level?
Daygo uses 200–900 pg/mL as the reference range. This app uses 200–900 pg/mL. Values in the low-normal band (roughly 200–300) can still mean a mild deficiency, which doctors sometimes confirm with an extra test (methylmalonic acid). Tingling hands or feet, fatigue and poor memory are typical signs of low B12.
How can I improve my Vitamin B12?
Meat, fish, eggs and dairy, or fortified foods if you eat plant-based. A B12 supplement if you're vegan; it's cheap and well-absorbed. Asking about absorption if you take metformin or acid-reducing medication long-term.
When should I see a doctor about Vitamin B12?
If B12 is below 200, or low-normal with symptoms like numbness, tingling or memory problems. Nerve damage from low B12 is preventable when caught early.
Source: MedlinePlus (NIH). Reference ranges are standard adult intervals — your own lab may report a different range for your age, sex, or method. This isn't medical advice; always go by the range on your actual results and talk to a clinician about anything that concerns you.