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24-Hour Vitamin Intake Assessment (Qualitative or Quantitative Analysis of Dietary Vitamin Consumption)

Published: August 9, 2026Updated: August 16, 2026

This test evaluates how much certain vitamins you consumed over the past 24 hours, often used to check if your diet meets recommended levels or if there may be deficiencies.

Quick summary

["Assesses your recent vitamin intake to identify potential gaps in nutrition."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
81072-1
Short code
Vit A intake 24h Est
Synonyms
Vit A intake 24h Est
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
20
Ref high
400
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
estimated
CPT
82670
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This test looks at the total intake of key vitamins (such as vitamin A, C, D, E, B vitamins, and possibly others) from food and beverages consumed in the last 24 hours. It may include qualitative or quantitative analysis depending on the method used.

Why It’s Done

Doctors may order this test if you have symptoms of vitamin deficiency (like fatigue, weakness, or specific health concerns), if you’re on a special diet, or if you’re taking supplements and want to track intake.

What to Expect Before the Test

You’ll need to keep a detailed food and drink log for 24 hours before the test. Some tests may require specific dietary restrictions or fasting, so follow your healthcare provider’s instructions carefully.

What the Results Mean

Results help determine if your vitamin intake is adequate or if adjustments to your diet or supplements are needed. Low intake may indicate dietary gaps, while high intake could signal excess consumption.

Reference range

Premenopausal: 20-400 pg/mL; Postmenopausal: <30 pg/mLN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Vitamin Intake 24h

Frequently asked questions

Is this test covered by insurance?
Check with your insurance provider before the test, as coverage depends on medical necessity. Some insurers may require a referral or specific diagnosis to approve this test.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on the lab and method used. Follow-up with your doctor if you have questions about your results.
Can I eat or drink anything before the test?
Yes, you can eat and drink normally, but keep a detailed log of everything you consume for 24 hours. Avoid special dietary restrictions unless instructed otherwise.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy