Mineral
Potassium (as Potassium Chloride)
Also known as: Potassium Chloride, KCl, Potassium, K+
Potassium is an essential electrolyte mineral critical for heart rhythm, muscle contraction, and blood pressure regulation. Strong clinical evidence supports potassium supplementation for maintaining normal cardiovascular and neuromuscular function, particularly in populations with deficiency or high sodium intake.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Potassium (as Potassium Chloride) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | NutraBio Whey Protein Isolate Powder | 96 A | $2.50 |
| 2 | BulkSupplements Glucosamine Sulfate Capsules | 95 A | $0.05 |
| 3 | Transparent Labs BULK Pre-Workout | 90 A | $1.67 |
| 4 | Thorne Heart Health Complex | 89 A | $1.43 |
| 5 | Onnit Grass Fed Whey Isolate Protein - Vanilla (30 Serving Tub) | 89 A | $2.00 |
| 6 | Thorne Joint Support Nutrients | 87 A | $1.00 |
| 7 | Thorne MediClear-SGS™ - Vanilla | 86 A- | $2.10 |
| 8 | Pure Encapsulations Potassium Magnesium (aspartate) | 86 A- | $0.20 |
| 9 | Nutricost Potassium + Magnesium Citrate Capsules | 86 A- | $0.13 |
| 10 | Thorne Catalyte® | 85 A- | $1.13 |
| 11 | Jarrow Formulas Ultra BoneUp | 85 A- | $0.41 |
| 12 | Jarrow Formulas BoneUp | 85 A- | $0.57 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Potassium (as Potassium Chloride) should I take?
The typical range is 1500-4700 mg daily (Adequate Intake: 2600 mg for women, 3400 mg for men). Long-term daily use appropriate for maintenance; therapeutic dosing should follow clinical guidance
When should I take Potassium (as Potassium Chloride)?
With meals or water; divided doses preferred. Recommended to minimize GI distress.
Which form of Potassium (as Potassium Chloride) is best?
Powder. Other forms in the catalog: Capsule, Tablet.
Is Potassium (as Potassium Chloride) safe?
Commonly reported: Nausea and vomiting (especially on empty stomach), Abdominal discomfort, Diarrhea, Heartburn.
Which Potassium (as Potassium Chloride) supplement scores highest?
NutraBio Whey Protein Isolate Powder, at 96/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Daily target & upper limit
4700 mg / dayPotassium (as Potassium Chloride) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
Potassium (as Potassium Chloride) dosage reference →Primary uses
- Electrolyte balance
- Blood pressure support
- Cardiovascular health
- Muscle function
- Nerve transmission
How it works
- Maintains intracellular osmotic pressure and fluid balance
- Regulates cardiac action potentials and heart rhythm
- Supports muscle contraction and relaxation
- Modulates vascular tone and blood pressure
- Enables sodium-potassium pump function
Dosage
- Typical range
- 1500-4700 mg daily (Adequate Intake: 2600 mg for women, 3400 mg for men)
- Timing
- With meals or water; divided doses preferred
- With food
- Recommended to minimize GI distress
- Duration
- Long-term daily use appropriate for maintenance; therapeutic dosing should follow clinical guidance
- Special populations
- Individuals with kidney disease, diabetes, or taking ACE inhibitors/potassium-sparing diuretics require medical supervision. Supplementation contraindicated in hyperkalemia.
Forms
- Powder· 70/100
- Capsule· 70/100
- Tablet· 70/100
Safety
Common side effects
- Nausea and vomiting (especially on empty stomach)
- Abdominal discomfort
- Diarrhea
- Heartburn
Contraindications
- Chronic kidney disease (increased hyperkalemia risk)
- Taking potassium-sparing diuretics without medical supervision
- ACE inhibitor or ARB use (without physician approval)
- Hyperkalemia or elevated serum potassium levels
- Certain heart arrhythmias
Products containing Potassium (as Potassium Chloride)
Top-scoring supplements in our catalog that list Potassium (as Potassium Chloride) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Potassium is a well-established essential nutrient with extensive RCT evidence supporting cardiovascular and blood pressure benefits. Deficiency correction is well-documented in clinical literature.
Grade A: Multiple well-designed human trials support the main claims.
Related in Mineral
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.