Vitamin C (ascorbic acid) test
Quick answer: This blood test measures vitamin C, which the body needs for healing, gums and skin, and absorbing iron. It is occasionally ordered when scurvy or severe deficiency is suspected, such as with bleeding gums and a very limited diet.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
How the test is done
- 1You may be asked to avoid vitamin C supplements for a short time if your doctor allows
- 2A vein in your arm is cleaned
- 3Blood is drawn and protected from light
- 4The sample is cooled and sent to the lab quickly
What your results can mean
Reading your report
Normal ranges differ between labs, so compare your result with the range printed on your report and discuss it with your doctor.
If the result is outside the usual range
A low level can be seen with a diet very low in fruit and vegetables, smoking, heavy alcohol use or gut absorption problems, and severe deficiency causes scurvy. A high level is usually seen with supplements.
Who usually has this test
People with bleeding gums, easy bruising, slow healing or a very limited diet, and those with gut absorption problems.
Risks and aftercare
You can eat normally and restart any supplements your doctor allows once the sample is taken.
Names and options
Also called: ascorbic acid level
Listed by the hospital as
- ASCORBIC ACID (VITAMIN C), PLASMA
Questions about this test
What is scurvy?
Scurvy is caused by severe vitamin C deficiency. It can cause tiredness, bleeding gums, easy bruising, joint pain and slow wound healing. It is uncommon but still seen with very limited diets.
Why must the sample be handled quickly?
Vitamin C breaks down quickly once blood is taken. Labs usually protect the sample from light and keep it cool to get a reliable result.
Does vitamin C help iron absorption?
Yes. Vitamin C helps the body absorb iron from plant foods. Eating fruit or vegetables rich in vitamin C with meals can help if you have low iron.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.