A Potassium test measures the level of potassium in your blood. Potassium is a critical electrolyte that regulates heartbeat, muscle contractions, and nerve signals. Both high and low potassium levels can be dangerous.
What This Test Measures
Potassium (K):
An electrolyte that maintains electrical activity in heart muscle and other cells. Even small changes in potassium levels can significantly affect heart rhythm and muscle function.
Reference Range
Normal: 3.5-5.0 mEq/L
Levels outside 3.0-6.0 mEq/L may be dangerous and require urgent attention.
Who Should Consider This Test
• Those taking diuretics (water pills)
• Blood pressure medication monitoring
• Kidney disease
• Heart conditions
• Diabetes
• Symptoms of potassium imbalance (muscle weakness, cramps, irregular heartbeat)
• Those on ACE inhibitors or potassium-sparing diuretics
Understanding Results
High Potassium (Hyperkalemia):
• Kidney disease (most common cause)
• Certain medications (ACE inhibitors, potassium-sparing diuretics)
• Tissue damage
• Addison’s disease
Symptoms: Muscle weakness, fatigue, irregular heartbeat
Low Potassium (Hypokalemia):
• Diuretics
• Diarrhea or vomiting
• Excessive sweating
• Not eating enough potassium
Symptoms: Weakness, cramps, constipation, irregular heartbeat
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required. Avoid clenching fist repeatedly during blood draw, as this can falsely elevate potassium.
Related Tests to Consider
• Electrolyte Panel – Potassium with sodium, chloride, CO2
• Comprehensive Metabolic Panel – Includes kidney function
• Magnesium – Often depleted alongside potassium
Why Choose Wittmer Rejuvenation Clinic
At $10.50, our Potassium test is affordably priced. We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing.




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