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24-Hour Vitamin Intake Assessment (Qualitative)

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

This test evaluates the estimated intake of vitamins over a 24-hour period based on self-reported dietary habits. It helps identify potential deficiencies or excessive consumption of key vitamins.

Quick summary

["Assesses vitamin intake patterns to guide dietary adjustments if needed."]

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

Key facts at a glance

LOINC
81073-9
Short code
Vit A intake 24h Measured
Synonyms
Vit A intake 24h Measured
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
measured
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 does not measure actual vitamin levels in your body but instead uses a questionnaire to estimate how much of certain vitamins you consumed in the past day. It focuses on common vitamins like vitamin A, vitamin C, vitamin D, vitamin E, vitamin K, and B vitamins (B1, B2, B3, B5, B6, B7, B9, B12).

How It Works

You’ll complete a food and beverage log detailing what you ate and drank over the last 24 hours. A healthcare provider or lab technician analyzes this log to assess your vitamin intake relative to recommended daily amounts.

Why It’s Done

Doctors may order this test if you have symptoms of vitamin deficiency (e.g., fatigue, weakness) or if you’re on a special diet (e.g., vegan, vegetarian) that may affect vitamin absorption.

Possible Results

Results are qualitative and compared to general dietary guidelines. Low intake may indicate a need for dietary changes or supplements, while high intake may warrant monitoring for excess.

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

How long will I need to keep track of my food intake?
You’ll need to record every food and drink you consume for the full 24-hour period, including snacks, supplements, and beverages. Some labs may provide a log to simplify the process.
Can this test replace a blood vitamin test?
No, this test is a dietary assessment and does not measure actual vitamin levels in your blood. Blood tests are needed to confirm vitamin deficiencies or excesses.
What if my intake is low?
If your intake is low, your doctor may recommend dietary changes, fortified foods, or supplements to meet your needs. They’ll also check blood levels to guide treatment.
  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