We compared 10 of the most-reviewed potassium (a combined 148,385 customer reviews) and ranked them by verified review count so you can see what real shoppers actually buy.
How we rank it: Potassium Plus Iodine, 180 Tablets takes our top spot: it's the standout potassium in this guide, earning the lead for NOW Foods's reputation for quality.
How we rank it: We placed Potassium with Extend-Release Magnesium, 60 Vegetarian Capsules at #2 thanks to its strong balance of quality and price.
How we rank it: At #3, Potassium Chloride Powder, 8 oz (227 g) earns its spot for how consistently shoppers reach for it.
How we rank it: We placed Potassium + Magnesium, 240 Capsules at #4 thanks to its strong balance of quality and price.
How we rank it: Liquid Iodine Plus with Potassium Iodide, Unflavored, 2 fl oz (59 ml) lands at #5 largely for Life-flo's reputation for quality.
How we rank it: We placed Potassium Gluconate, 595 mg, 110 Tablets at #6 thanks to how consistently shoppers reach for it.
How we rank it: Potassium Citrate, 99 mg, 180 Veg Capsules lands at #7 largely for NOW Foods's reputation for quality.
How we rank it: Potassium Citrate, Pure Powder, 12 oz (340 g) lands at #8 largely for NOW Foods's reputation for quality.
How we rank it: At #9, Potassium Citrate, 99 mg, 90 Tablets earns its spot for how consistently shoppers reach for it.
How we rank it: At #10, HydrationUP®, Electrolyte Drink Mix with Calcium, Potassium, Vitamin C, and Vitamin E, Mixed Berry, 8 oz (227 g) earns its spot for how consistently shoppers reach for it.
| # | Product | Brand | Score | Rating | Reviews | Price | |
|---|---|---|---|---|---|---|---|
| 1 | Potassium Plus Iodine, 180 Tablets | NOW Foods | 9.7 | 4.8 | 7,613 | $10.40 | View → |
| 2 | Potassium with Extend-Release Magnesium, 60 Vegetarian Capsules | Life Extension | 9.7 | 4.8 | 5,789 | $11.25 | View → |
| 3 | Potassium Chloride Powder, 8 oz (227 g) | NOW Foods | 9.5 | 4.7 | 3,330 | $6.11 | View → |
| 4 | Potassium + Magnesium, 240 Capsules | Nutricost | 9.7 | 4.8 | 1,516 | $13.95 | View → |
| 5 | Liquid Iodine Plus with Potassium Iodide, Unflavored, 2 fl oz (59 ml) | Life-flo | 9.9 | 4.9 | 70,223 | $9.69 | View → |
| 6 | Potassium Gluconate, 595 mg, 110 Tablets | 21st Century | 9.3 | 4.6 | 20,009 | $4.99 | View → |
| 7 | Potassium Citrate, 99 mg, 180 Veg Capsules | NOW Foods | 9.7 | 4.8 | 18,666 | $9.17 | View → |
| 8 | Potassium Citrate, Pure Powder, 12 oz (340 g) | NOW Foods | 9.7 | 4.8 | 10,303 | $11.63 | View → |
| 9 | Potassium Citrate, 99 mg, 90 Tablets | Natural Factors | 9.7 | 4.8 | 6,695 | $5.57 | View → |
| 10 | HydrationUP®, Electrolyte Drink Mix with Calcium, Potassium, Vitamin C, and Vitamin E, Mixed Berry, 8 oz (227 g) | California Gold Nutrition | 9.3 | 4.6 | 4,241 | $25.73 | View → |
Our editorial team evaluates every product on the factors that matter most to shoppers, not just price.
We rank by verified customer reviews and rating. For added assurance, we recommend choosing products that carry independent third-party testing or certification. These organisations publish public standards and verified-product listings:
This guide is for general information only and is not medical advice. Consult a qualified professional before starting any supplement.
Top-reviewed brands in this category include NOW Foods, Life Extension, Nutricost, Life-flo and others.
Based on verified customer review counts, Potassium Plus Iodine, 180 Tablets by NOW Foods is the best-reviewed potassium, with 7,613 reviews and a 4.8/5 rating.
On this list, prices range from $4.99 to $25.73, with a typical price around $10.40.
Potassium Plus Iodine, 180 Tablets leads with 7,613 verified reviews, followed by Potassium with Extend-Release Magnesium, 60 Vegetarian Capsules with 5,789.
Potassium Gluconate, 595 mg, 110 Tablets is the lowest-priced pick at $4.99, with a 4.6/5 rating from 20,009 reviews.