Mineral
Potassium
Also known as: Potassium citrate, Potassium chloride
Essential electrolyte for blood pressure and heart function. Most Americans are deficient.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Potassium 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 should I take?
The typical range is 99mg supplement limit (aim for 3500-4700mg from diet). Ongoing (mainly from food)
When should I take Potassium?
With food, divided. Yes.
Which form of Potassium is best?
Citrate — Common supplement form. Other forms in the catalog: Chloride, From food.
Is Potassium safe?
Commonly reported: GI upset. Serious warnings: Hyperkalemia (dangerous), Heart rhythm issues. Kidney disease is major contraindication
Which Potassium 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 has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
Potassium dosage reference →Primary uses
- Blood pressure
- Heart rhythm
- Muscle function
- Electrolyte balance
What systematic reviews concluded
Outcomes that systematic reviews of Potassium reached a verdict on: 2 with a benefit, 1 with no effect, 2 unclear. Each is quoted from a review and linked to it on PubMed. How these were read.
Reviews found a benefit (2)
“Several medical interventions for kidney stone management are supported by high-certainty evidence, particularly post-SWL α-blocker therapy and potassium citrate for recurrence prevention.” PMID 40891477
“Our findings indicate an adequate intake of potassium is desirable to achieve a lower BP level but suggest excessive potassium supplementation should be avoided, particularly in specific subgroups.” PMID 32500831
Reviews found no effect (1)
“calcium and potassium remain unsupported.” PMID 41812583
Not enough to say: bone turnover markers; muscle mass and strength.
How it works
- Blood pressure regulation
- Heart rhythm
- Sodium balance
- Muscle contraction
Dosage
- Typical range
- 99mg supplement limit (aim for 3500-4700mg from diet)
- Timing
- With food, divided
- With food
- Yes
- Duration
- Ongoing (mainly from food)
- Special populations
- Hypertension, diuretic users, heavy sweaters
Forms
- Citrate
- Chloride
- From food
Safety
Common side effects
- GI upset
Contraindications
- Kidney disease
- Taking potassium-sparing drugs
Products containing Potassium
Top-scoring supplements in our catalog that list Potassium on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Known interactions
Evidence notes
Essential, widely deficient
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.