Vitamin B6 (pyridoxine) helps with protein metabolism, red blood cell production and nerve function.
- Normal range (adults)
- 5–50 ng/mL (20–202 nmol/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Pyridoxine, B6, Vit B6, Serum B6, Pyridoxal Phosphate, PLP
Vitamin B6 normal range
| Group | ng/mLConventional units: US, South Asia | nmol/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Adults | 5–50 | 20–202 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Vitamin B6 test done?
It is checked for unexplained nerve symptoms, anemia, or suspected excess from supplements.
What does a high Vitamin B6 level mean?
High B6 almost always comes from supplements and can cause numbness and tingling in the hands and feet.
Common causes
- High-dose B6 or B-complex supplements
- Energy drinks with added B6
Diet and lifestyle tips
- Stop B6-containing supplements and energy drinks
- Symptoms usually improve over months
What does a low Vitamin B6 level mean?
Low B6 can cause anemia, a sore tongue, cracked lips, low mood and nerve symptoms.
Common causes
- Alcohol
- Kidney disease
- Some medicines, such as isoniazid (TB treatment)
- Poor diet
Diet and lifestyle tips
- Eat chicken, fish, potatoes, chickpeas, bananas and fortified cereals
- Avoid alcohol
When should you see a doctor?
Ask your doctor before taking B6 supplements, especially long-term.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.