Skip to content

24-Hour Potassium Intake Assessment

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

This test measures the total amount of potassium you consume over a 24-hour period, helping healthcare providers assess dietary intake and identify potential deficiencies or excesses.

Quick summary

["Understanding your potassium intake helps manage dietary habits and health risks related to electrolyte balance."]

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

Key facts at a glance

LOINC
9076-1
Short code
Potassium intake 8h
Synonyms
Potassium intake 8h
Category
electrolyte
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
3.5
Ref high
5
Critical range
2.5 N/A – 6.5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84132
SNOMED
110742001
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

Potassium is an essential electrolyte that supports nerve function, muscle contractions, and heart health. Monitoring intake helps ensure you’re meeting nutritional needs without overloading your body.

How the Test Works

You’ll keep a food and drink diary for 24 hours while providing a urine sample at the end. The test calculates total potassium intake by analyzing what you consumed during that period.

What to Expect Before the Test

No special preparation is needed, but track all foods, beverages, and supplements you consume. Avoid taking potassium supplements or medications unless approved by your provider.

What the Results Mean

Results help determine if your dietary potassium intake is adequate or if adjustments are needed. Low intake may indicate poor dietary habits, while high intake could signal excessive consumption (e.g., from processed foods or supplements).

Reference range

Adult: 3.5-5.0 mmol/LN/A

Specimen: serum

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal potassium intake may affect heart rhythm, muscle function, or overall electrolyte balance. Chronic deficiencies or excesses can lead to long-term health concerns, so this test aids in preventive care and personalized dietary planning.

Short name

24-Hour Potassium Intake

Frequently asked questions

Do I need to fast before this test?
No fasting is required. Focus on recording all foods, drinks, and supplements you consume during the 24-hour period.
How long will I need to keep a food diary?
You’ll need to document your intake for a full 24-hour period, including meals, snacks, and beverages.
Can I take potassium supplements during this test?
Avoid potassium supplements unless instructed by your healthcare provider to prevent inaccurate 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