Vitamin C — What It Means in Your Blood Test
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Vitamin C helps your body heal wounds, keep skin and gums healthy, and absorb iron.
This Vitamin C reading shows how well stocked you are with the nutrient. Having enough on board supports tissue repair, keeps gums and skin in good shape, and eases iron uptake.
Also known as: ascorbic acid, ascorbate, L-ascorbic acid, serum ascorbate, ascorbyl
This isn't a case where higher or lower is better. Your body keeps it in a narrow band, and both directions can matter.
Last reviewed: 2026-08-16
What is Vitamin C?
Vitamin C is a vitamin that dissolves in water. It helps your body make collagen for skin and gums, supports your immune system, and helps you absorb iron. This test measures your level.
Why is Vitamin C tested?
Your doctor may order this test if scurvy (a vitamin C shortage) or poor nutrition is a concern.
What is a normal Vitamin C range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- Normal: 0.4–2.0 mg/dL; Deficiency (scurvy risk): <0.2 mg/dL (NIH Office of Dietary Supplements 2021)
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [Institute of Medicine, 2000]
What does your Vitamin C value mean?
There is no widely-accepted set of value bands for this parameter. Compare your result with the reference range printed on your own report, and discuss it with your doctor.
What does a high Vitamin C result mean?
Extra vitamin C from supplements usually leaves your body in urine. Very large doses may raise the risk of kidney stones in some people, worth discussing with your doctor.
What does a low Vitamin C result mean?
A low level can leave you tired, with bleeding gums and wounds that heal slowly. A severe shortage causes scurvy.
What can affect your Vitamin C result?
- Citrus fruits and berries
- Smoking
- Physical stress or illness
- Cooking with heat
- Absorption and kidney clearance
Questions to ask your doctor
About this result
- What does my Vitamin C result mean for me specifically, given my age and health?
- Is my Vitamin C in the range that is right for me, not just the lab's general range?
What to do next
- Could anything I eat, do, or take have affected my immune and healing vitamin result?
- Is there anything I should do about my Vitamin C, or is it fine to leave as it is?
About retesting
- Does my Vitamin C need to be repeated, and if so, when?
- The typical range for Vitamin C can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my Vitamin C be looked at together with my Vitamin D (25-OH) and Vitamin B12 result?
- Does my Vitamin C connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is Vitamin C?
- Vitamin C is a vitamin that dissolves in water. It helps your body make collagen for skin and gums, supports your immune system, and helps you absorb iron. This test measures your level. Your doctor may order this test if scurvy (a vitamin C shortage) or poor nutrition is a concern.
- What is a normal immune and healing vitamin range?
- A typical adult range is around Normal: 0.4–2.0 mg/dL; Deficiency (scurvy risk): <0.2 mg/dL (NIH Office of Dietary Supplements 2021). No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison. Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
- What does a high Vitamin C result mean?
- Extra vitamin C from supplements usually leaves your body in urine. Very large doses may raise the risk of kidney stones in some people, worth discussing with your doctor.
- What does a low Vitamin C result mean?
- A low level can leave you tired, with bleeding gums and wounds that heal slowly. A severe shortage causes scurvy.
- What can affect your Vitamin C result?
- Several everyday factors can influence it, including Citrus fruits and berries, Smoking, Physical stress or illness, Cooking with heat, Absorption and kidney clearance.
Sources
- Institute of Medicine (2000) — Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids
Part of the Vitamins
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