Vitamin C
Vitamin C (ascorbic acid) measures the level of this water-soluble vitamin in your blood. Vitamin C is a powerful antioxidant essential for collagen synthesis, wound healing, and immune function.
Category: Vitamins & Minerals
Also known as: vitamin c, ascorbic acid, vit c, ascorbate
Reference range: 0.4–2 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High vitamin C levels are uncommon due to its water-soluble nature but excessive supplementation may cause diarrhea, nausea, kidney stones, and can interfere with certain lab tests.
Low values may indicate
Low vitamin C levels may indicate scurvy, poor dietary intake, smoking, alcoholism, or malabsorption, and can cause fatigue, bruising, bleeding gums, and impaired wound healing.
Frequently asked questions
- What is a normal Vitamin C level?
- A typical reference range for Vitamin C is 0.4–2 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Vitamin C measured in?
- Vitamin C is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Vitamin C reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Vitamin C over time?
- Yes. Upload results from any lab and BloodId charts your Vitamin C over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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