Order Vitamin A (Retinol) Blood Test from JustLabs for $39. Price includes lab processing at Quest Diagnostics. A one-time $18 collection fee applies per order. No insurance required.
Vitamin A is a fat-soluble vitamin essential for vision (especially night vision), immune function, skin health, cell growth, and reproduction.
Vitamin A refers to a group of fat-soluble compounds including retinol, retinal, and retinoic acid. It plays irreplaceable roles in vision—particularly night vision and color perception—immune system function, skin cell turnover, bone growth, and reproductive health. Vitamin A is also a powerful antioxidant.
Unlike water-soluble vitamins, vitamin A is stored in the liver and can accumulate to toxic levels with excessive intake. This makes testing valuable to ensure you're in the optimal range—neither deficient nor at risk of toxicity.
Dietary vitamin A comes in two forms: preformed vitamin A (retinol) from animal sources like liver, fish, eggs, and dairy; and provitamin A carotenoids (like beta-carotene) from colorful fruits and vegetables that your body converts to retinol. This test measures retinol, the active form circulating in your blood.
Price
$39
Results
3-5 business days
Lab Network
Quest
Fasting
Not Required
What's Measured
What This Test Measures
This test measures retinol (vitamin A) concentration in your blood serum. Normal levels typically range from 28-86 mcg/dL. Levels below 20 mcg/dL indicate deficiency, while levels above 100 mcg/dL may suggest toxicity risk.
Who Should Consider This Test
People with night blindness or vision changes, those with dry skin, eyes, or recurrent infections, individuals with malabsorption conditions (celiac, Crohn's, cystic fibrosis), people who've had gastric bypass surgery, those taking high-dose vitamin A supplements or using retinoid medications, and people with liver disease.
Health Insights
Conditions Screened
Related Symptoms
When to Get Tested
Fasting for 8-12 hours is recommended as recent fat intake can affect levels. Avoid vitamin A supplements for 24 hours before testing for baseline assessment.
Understanding Your Results
Normal vitamin A is 28-86 mcg/dL. Low levels indicate deficiency requiring supplementation and investigation of underlying causes. High levels (>100 mcg/dL) may indicate toxicity risk, especially with continued supplementation. Chronic toxicity can cause liver damage, bone problems, and birth defects.
What to Expect
After placing your order, you'll receive an email from Rupa Health (our lab order partner) within 24 business hours to sign a consent form and schedule your blood draw at a Quest Diagnostics location.
The blood draw typically takes just a few minutes. Results are usually available within 3-5 business days and will appear in your secure Justlabs dashboard.
Our results include reference ranges and easy-to-understand indicators showing whether your values are within normal limits.
Frequently Asked Questions
$39
Typical hospital cash price: $100–$200
+ $28 in standard lab & physician fees at checkout (no additional bills later)
$18 lab collection + $10 physician order
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