Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
Treatment often starts right away without waiting for results when deficiency is suspected.
Why it's done
- Heavy drinking, poor nutrition, or weight-loss surgery
- Confusion or unsteady walking
Getting ready and what happens
- None.
How the test is done
- A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.
What the results mean
Low
Treated with thiamine, sometimes by IV.
When a result needs quick action
Call 911Confusion, trouble walking, or abnormal eye movements, especially with heavy drinking
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Sources
Last updated 2026-11-13.