The short answer
Measures ascorbic acid levels — important for immune function, collagen production, and antioxidant protection, measured from a standard blood draw. At TestWell it costs $44.99 plus a $6 lab fee, requires an 8–12 hour fast, and results post in 3–7 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$150
cash pay
Other Labs
$49
+ lab fees
TestWell
$44.99
+ $6 lab fee
Vitamin C is a water-soluble vitamin and powerful antioxidant essential for collagen synthesis, wound healing, iron absorption, and immune function. Severe deficiency causes scurvy, while mild deficiency can cause fatigue, poor wound healing, and weakened immunity. Smokers, those with limited fruit and vegetable intake, and people with certain GI conditions are at higher risk for deficiency.
Vitamin and nutrient testing identifies deficiencies that can drive fatigue, immune dysfunction, neurological symptoms, and long-term disease risk — and confirms that supplementation is working.
Anyone with restrictive diets (vegan, low-fat, low-carb), malabsorption conditions, fatigue, hair loss, mood changes, or currently supplementing and wanting to verify dosing.
Sample Type
Blood draw
Fasting
Required
Results In
3–7 business days
Performed At
Quest or Labcorp
Your Vitamin C (Ascorbic Acid) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–7 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Fasting for 10–12 hours recommended. Avoid vitamin C supplements for 24 hours before.
A Vitamin C (Ascorbic Acid) test costs $44.99 at TestWell — $50.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Ordered directly from the labs' own consumer sites, the same test lists at $49.00 at Quest Health and $59.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $150.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest or Labcorp) | $44.99 | $50.99 | Includes the one $6 lab processing fee, charged once per order |
| Quest Health (Quest Diagnostics' own site) | $49.00 | $49.00 | list price checked Sep 12, 2026 |
| Labcorp OnDemand (Labcorp's own site) | $59.00 | $59.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $150.00 | $150.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 929 · Labcorp test no. 001805 · BioReference code 0291-5. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$44.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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Vitamin C (Ascorbic Acid)
$44.99