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Total Cholesterol with 24-Hour Fluid Collection (Mass Concentration)

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

This test measures the total amount of cholesterol found in your body fluids over a 24-hour period. Cholesterol is a type of fat that your body needs for many functions but can also contribute to health risks if levels are too high.

Quick summary

["Cholesterol helps your body function, but high levels may increase heart disease risk."]

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

Key facts at a glance

LOINC
58934-1
Short code
Fat 72h Stl-mCnt
Synonyms
Fat 72h Stl-mCnt
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have high cholesterol, a family history of heart disease, or symptoms like fatigue, chest pain, or unexplained shortness of breath. It helps assess overall cholesterol balance and long-term cardiovascular health.

What to Expect Before the Test

You’ll collect a 24-hour urine sample starting after breakfast on the first day. Drink plenty of fluids, but avoid foods high in fat or salt. Return the sample to your lab on time to ensure accurate results.

How the Test Works

Your collected fluid is analyzed to measure cholesterol levels. The test detects cholesterol mass concentration, which reflects your body’s overall fat metabolism and storage.

What the Results Mean

Results are compared to general guidelines, but individual ranges vary. High levels may signal metabolic or cardiovascular risks, while low levels could indicate malabsorption or other conditions. Always discuss results with your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How often should I get this test?
Typically, cholesterol tests are recommended every 1–5 years, depending on your risk factors. Your provider will determine the best schedule for you, especially if you have conditions like diabetes, high blood pressure, or a family history of heart disease.
What does a high cholesterol result mean?
A high cholesterol result suggests your body may be producing or absorbing too much cholesterol. This can increase the risk of plaque buildup in arteries, leading to heart disease or stroke. Lifestyle changes, medications, or further testing may be needed to manage it.
Can diet affect this test?
Yes, diet plays a major role. Foods high in saturated fats, trans fats, and cholesterol can raise levels, while fruits, vegetables, whole grains, and healthy fats (like olive oil) may help lower them. Your provider may recommend dietary adjustments based on your results.
  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