24-Hour Potassium Intake Measurement
This test measures how much potassium you consume over a 24-hour period. It helps assess dietary potassium intake, which is important for maintaining proper electrolyte balance and overall health.
["Understanding your potassium intake helps doctors check if your diet meets nutritional needs and identify potential deficiencies or excesses."]
Key facts at a glance
- LOINC
- 81009-3
- Short code
- Potassium intake 24h Measured
- Synonyms
- Potassium intake 24h Measured
- 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
- Method
- measured
- 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 Is Done
Your doctor may order a 24-hour potassium intake test if they suspect you’re not eating enough potassium-rich foods, or if you have symptoms like muscle weakness, cramps, or irregular heartbeat that might be linked to electrolyte imbalances. It’s also used in research or clinical studies to evaluate dietary habits.
What to Expect Before the Test
You’ll need to keep a detailed food and drink log for 24 hours, recording everything you eat and drink, including salt, sauces, and supplements. Avoid special diets unless instructed by your healthcare provider.
How the Test Works
No blood or urine sample is taken for this test. Instead, you’ll provide a record of your intake, which is analyzed to estimate total potassium consumption.
What the Results Mean
Results help determine if your potassium intake is adequate or if adjustments to your diet are needed. Low intake may indicate poor dietary habits, while high intake could signal excessive consumption of potassium-rich foods or supplements.
Reference range
Adult: 3.5-5.0 mmol/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
24-hour potassium intake
Frequently asked questions
Potassium is essential for nerve function, muscle contractions, and maintaining fluid balance. Chronic low intake may contribute to fatigue, weakness, or heart issues, while excessive intake can cause nausea, diarrhea, or irregular heart rhythms. This test helps prevent or manage these risks.
Results are typically processed within 1–2 weeks after your healthcare provider submits your intake log. Follow up with your doctor if you have questions about interpreting your results.
No special diet is required, but you must accurately log *all* food and beverages, including hidden potassium sources like processed foods and sauces. Stick to your usual eating habits during the 24-hour period.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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