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: Soy Protein Intake 24-Hour Estimated

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

: This test estimates how much soy protein a person consumed over the past 24 hours, usually from a dietary recall or food questionnaire rather than a blood or urine measurement.

Quick summary

[": It is a dietary intake estimate used to understand soy consumption, not a diagnostic lab value."]

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

Key facts at a glance

LOINC
80480-7
Short code
Soy protein intake 24h Est
Synonyms
Soy protein 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 Represents

: The result reflects an estimate of soy protein eaten during a 24-hour period. It is typically derived from a diet history, food record, or questionnaire and is used in nutrition research or dietary assessment.

: How the Estimate Is Made

: A trained interviewer or a structured food questionnaire asks about foods and drinks consumed in the previous day, and soy-containing foods are identified and converted into an estimated protein amount using food composition data.

: Why Soy Intake May Be Assessed

: Soy intake may be evaluated when studying diet and health, when assessing protein sources in a vegetarian or plant-based eating pattern, or when a clinician or researcher wants a snapshot of recent eating habits.

: Limits of a 24-Hour Estimate

: A single day may not represent usual intake, and estimates depend on accurate recall and complete food databases. This is not a substitute for a measured nutrient biomarker in blood or urine.

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.

◆Associated findings1

Short name

: NONE

Frequently asked questions

: Is this the same as a soy allergy blood test?
: No. This estimates dietary soy protein intake from food information; a soy allergy test measures specific antibodies in blood and is ordered separately.
: Do I need to fast or prepare for this test?
: No fasting is needed for a dietary intake estimate. You may be asked to recall all foods and drinks from the previous 24 hours as accurately as possible.
: Can one day of soy intake predict my long-term health?
: No. A single 24-hour estimate is only a snapshot; usual intake over weeks or months is better assessed with repeated records or a food frequency questionnaire.
  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