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Fasting Cholesterol Level (Total Cholesterol)

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

This test measures the total amount of cholesterol in your blood after you’ve fasted for at least 12 hours. Cholesterol is a type of fat your body needs for healthy cells, but high levels can increase your risk of heart disease.

Quick summary

["Your cholesterol levels help assess your heart health risk."]

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

Key facts at a glance

LOINC
76696-4
Short code
Name Fclty
Synonyms
Name Fclty
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Why This Test Matters

Cholesterol is a vital substance your body uses to build cell membranes and produce hormones. However, having too much cholesterol in your blood can lead to plaque buildup in your arteries, increasing the risk of heart disease or stroke. This test helps doctors monitor your overall cholesterol status and guide treatment if needed.

What to Expect Before the Test

You’ll need to fast (not eat or drink anything except water) for 12 hours before your blood draw. Your doctor or lab will provide specific instructions. Bring any medications you’re currently taking, as some may affect your results.

How the Test Works

A healthcare provider will draw blood from a vein in your arm. The sample is then analyzed to measure total cholesterol, which includes both low-density lipoprotein (LDL) and high-density lipoprotein (HDL) cholesterol, as well as triglycerides and other fats.

What the Results Mean

Results are typically reported as a single number representing total cholesterol. While exact reference ranges vary by lab, higher-than-normal levels may signal a need for lifestyle changes, diet adjustments, or medical interventions to lower cholesterol and reduce heart disease risk.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Cholesterol

Frequently asked questions

How often should I get this test?
Most adults are advised to get a fasting cholesterol test at least once every 4–5 years, starting at age 20. If you have risk factors (like high blood pressure, diabetes, or a family history of heart disease), your doctor may recommend more frequent testing.
What if my results are high?
If your cholesterol is elevated, your doctor may recommend dietary changes (e.g., reducing saturated fats), exercise, or medications like statins to lower it. Follow-up tests will help track progress.
Can I eat or drink anything before the test?
No—you must fast for 12 hours before the test, except for water. Avoid alcohol and sugary drinks/snacks during this time.
  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