Bottom line: potassium is one supplement category where more is not automatically better. Most readers should fix potassium intake with food first, then consider a modest supplement only if the label, dose, and safety fit make sense. For 2026, our top pick is NOW Potassium Citrate because it is simple, widely available, and easy to compare against the rest of the category.
Short on time? Choose NOW Potassium Citrate if you want the safest starting point for an Amazon-available potassium supplement. Choose food first if you are simply trying to raise daily potassium intake.
Quick Picks: Best Potassium Supplements
- Best Overall Pick: NOW Potassium Citrate
- Best Budget Citrate Pick: Nutricost Potassium Citrate
- Best Drugstore-Style Pick: Nature Made Potassium Gluconate
- Best Premium Pick: Thorne Potassium Citrate
- Best Basic Capsule Pick: Solaray Potassium
- Best Value Caplet Pick: Nature’s Wonder Potassium
- Best Whole Foods Brand Pick: 365 Everyday Value Potassium
- Best Powder Pick: BulkSupplements Potassium Citrate Powder
- Best Amazon Brand Pick: Amazon Basic Care Potassium Gluconate
- Best Higher-Dose Comparison: Earthborn Elements Potassium Bicarbonate
How We Ranked Potassium Supplements
Last checked: April 2026
We reviewed the old FitnessVolt page, current Amazon availability, Innerbody’s potassium supplement guide, Forbes Health’s potassium supplement overview, NIH Office of Dietary Supplements potassium guidance, NCBI dietary reference material, FDA supplement guidance, and recent reader concerns about high-dose potassium use.
We scored each product for dose practicality, potassium form, label clarity, brand trust, buyer fit, value, safety cautions, and whether the product uses a clean direct Amazon affiliate URL. Products lost points for confusing serving sizes, higher-dose formats that invite sloppy measuring, old shortlinks, or wording that made potassium sound too casual.
Potassium Supplement Comparison
| Rank | Product | Form | Best for | Rating | |
|---|---|---|---|---|---|
| 1 | NOW Potassium Citrate | Citrate | most readers who want a simple 99 mg potassium citrate capsule from a widely trusted brand | 4.5/5 | Check Price |
| 2 | Nutricost Potassium Citrate | Citrate | budget shoppers who want potassium citrate with a clean Amazon buying path | 4.4/5 | Check Price |
| 3 | Nature Made Potassium Gluconate | Gluconate | readers who prefer a familiar drugstore supplement brand | 4.3/5 | Check Price |
| 4 | Thorne Potassium Citrate | Citrate | buyers who prefer practitioner-style brands and do not mind paying more | 4.3/5 | Check Price |
| 5 | Solaray Potassium | Citrate | users who want a no-fuss capsule from a legacy supplement brand | 4.1/5 | Check Price |
| 6 | Nature’s Wonder Potassium | Citrate | cost-conscious shoppers who want basic potassium gluconate caplets | 4.0/5 | Check Price |
| 7 | 365 Everyday Value Potassium | Chloride | shoppers who like store-brand supplements and simple formulas | 3.9/5 | Check Price |
| 8 | BulkSupplements Potassium Citrate Powder | Citrate | careful users who prefer powder and are comfortable measuring servings precisely | 3.8/5 | Check Price |
| 9 | Amazon Basic Care Potassium Gluconate | Gluconate | Amazon-first shoppers who want the simplest low-cost bottle | 3.8/5 | Check Price |
| 10 | Earthborn Elements Potassium Bicarbonate | Bicarbonate | experienced users comparing a higher-dose bicarbonate product with standard 99 mg capsules | 3.6/5 | Check Price |
Our Verdict
NOW Potassium Citrate
NOW Potassium Citrate is our top pick because it keeps the dose modest, uses a common citrate form, comes from a trusted supplement brand, and has clean Amazon availability.
Best for: Readers who want a simple low-dose potassium capsule after checking whether supplementation fits their situation
Check Price on AmazonThe 10 Best Potassium Supplements of 2026
1. NOW Potassium Citrate – Best Overall Pick
NOW Potassium Citrate
Best Overall PickPros
- 99 mg potassium per capsule
- Potassium citrate form
- Trusted mainstream brand
- Direct Amazon affiliate URL
Cons
- Still a low-dose supplement
- Not for users needing clinician-directed dosing
- Capsules may not suit everyone
Why it made the list: NOW Potassium Citrate fits most readers who want a simple 99 mg potassium citrate capsule from a widely trusted brand. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
2. Nutricost Potassium Citrate – Best Budget Citrate Pick
Nutricost Potassium Citrate
Best Budget Citrate PickPros
- Good price per bottle
- 99 mg dose
- Simple capsule format
- Verified Amazon ASIN
Cons
- Brand feel is more basic
- Large bottle is overkill for occasional use
- Check current seller
Why it made the list: Nutricost Potassium Citrate fits budget shoppers who want potassium citrate with a clean Amazon buying path. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
3. Nature Made Potassium Gluconate – Best Drugstore-Style Pick
Nature Made Potassium Gluconate
Best Drugstore-Style PickPros
- Familiar brand
- Potassium gluconate form
- Affordable
- Easy Amazon restock
Cons
- Lower potassium per tablet than some expect
- Not exciting
- Tablets may be less pleasant than capsules
Why it made the list: Nature Made Potassium Gluconate fits readers who prefer a familiar drugstore supplement brand. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
4. Thorne Potassium Citrate – Best Premium Pick
Thorne Potassium Citrate
Best Premium PickPros
- Premium brand trust
- Citrate form
- Simple ingredient positioning
- Verified Amazon URL
Cons
- Costs more
- Still only modest potassium per serving
- Not necessary for every buyer
Why it made the list: Thorne Potassium Citrate fits buyers who prefer practitioner-style brands and do not mind paying more. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
5. Solaray Potassium – Best Basic Capsule Pick
Solaray Potassium
Best Basic Capsule PickPros
- Simple daily capsule
- Long-running brand
- Good comparison pick
- Amazon ASIN verified
Cons
- Less differentiated
- Label should be checked before reorder
- Not a high-potassium food replacement
Why it made the list: Solaray Potassium fits users who want a no-fuss capsule from a legacy supplement brand. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
6. Nature’s Wonder Potassium – Best Value Caplet Pick
Nature's Wonder Potassium
Best Value Caplet PickPros
- Cheap bottle
- Caplet format
- Clear 99 mg style dose
- Direct Amazon link
Cons
- Plain formula
- Brand trust is not as strong as top picks
- Caplets may be large
Why it made the list: Nature’s Wonder Potassium fits cost-conscious shoppers who want basic potassium gluconate caplets. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
7. 365 Everyday Value Potassium – Best Whole Foods Brand Pick
365 Everyday Value Potassium
Best Whole Foods Brand PickPros
- Store-brand value
- Potassium chloride form
- Clean Amazon URL
- Simple label
Cons
- Availability can vary
- Not as compelling as NOW or Nature Made
- Chloride form may not suit everyone
Why it made the list: 365 Everyday Value Potassium fits shoppers who like store-brand supplements and simple formulas. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
8. BulkSupplements Potassium Citrate Powder – Best Powder Pick
BulkSupplements Potassium Citrate Powder
Best Powder PickPros
- Powder format
- Good bulk value
- No capsule burden
- Verified Amazon ASIN
Cons
- Measuring mistakes matter
- Poor fit for casual users
- Taste and mixing are less convenient
Why it made the list: BulkSupplements Potassium Citrate Powder fits careful users who prefer powder and are comfortable measuring servings precisely. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
9. Amazon Basic Care Potassium Gluconate – Best Amazon Brand Pick
Amazon Basic Care Potassium Gluconate
Best Amazon Brand PickPros
- Low price
- Simple caplet
- Fast Amazon restock
- Direct affiliate URL
Cons
- No premium brand story
- Basic formula
- Packaging can change
Why it made the list: Amazon Basic Care Potassium Gluconate fits Amazon-first shoppers who want the simplest low-cost bottle. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
10. Earthborn Elements Potassium Bicarbonate – Best Higher-Dose Comparison
Earthborn Elements Potassium Bicarbonate
Best Higher-Dose ComparisonPros
- Bicarbonate form
- Higher potassium amount per serving
- Capsule format
- Amazon availability
Cons
- Not a casual starter product
- Needs extra caution
- Lower score due to dose risk
Why it made the list: Earthborn Elements Potassium Bicarbonate fits experienced users comparing a higher-dose bicarbonate product with standard 99 mg capsules. We ranked it for practical dosing, label clarity, brand trust, and clean Amazon availability.
Best use: use it as a modest add-on after checking your diet and label instructions. Potassium-rich foods such as potatoes, beans, lentils, squash, yogurt, bananas, and dried fruit usually matter more than a small capsule.
Skip this if: you have kidney concerns, use potassium-sparing medication, use ACE inhibitors or ARBs, have heart rhythm concerns, or have been told to manage potassium carefully.
What Changed in This Update
- Updated the stale title, rankings, intro, metadata, and captions for 2026.
- Replaced every old Amazon shortlink with a direct tagged Amazon product URL.
- Added product cards, a verdict block, a comparison table, buyer-fit notes, and schema-ready product data.
- Reframed the guide around diet-first potassium intake and stronger safety cautions.
Who Should Consider a Potassium Supplement?
Potassium supplements make the most sense for readers who already know their diet is short on potassium-rich foods and want a small, label-directed add-on. They are not a smart replacement for food, and they are not something to dose aggressively without medical guidance.
If you are using medication that affects potassium balance, have kidney or heart-related concerns, or have been told to monitor electrolytes, ask a qualified clinician before using any potassium supplement. This is one of the few basic minerals where casual high dosing can go wrong quickly.
Food First: Better Potassium Sources
For most people, food is the better route. Potatoes, sweet potatoes, beans, lentils, spinach, tomatoes, squash, yogurt, milk, bananas, oranges, prunes, dried apricots, and fish can move daily intake more meaningfully than a typical 99 mg supplement.
That matters because many potassium pills are intentionally modest. A 99 mg capsule can be useful as a small add-on, but it is tiny compared with the potassium in a potato, a cup of beans, or a potassium-rich smoothie.
Potassium Forms: Citrate, Gluconate, Chloride, and Bicarbonate
Potassium Citrate
Citrate is common in supplement capsules and powders. It is our preferred default for most readers because it is easy to find and easy to compare across brands.
Potassium Gluconate
Gluconate is another common low-dose supplement form. It is often found in drugstore-style tablets and caplets.
Potassium Chloride
Chloride is common in salt substitutes and some supplements. It can be useful, but it deserves extra care if you are watching total electrolyte intake.
Potassium Bicarbonate
Bicarbonate products can contain more potassium per serving. That can be useful for experienced users with guidance, but it is not our favorite casual starting point.
How to Choose the Right Product
- Start with dose: most shoppers should begin by comparing standard low-dose products before looking at higher-dose powders.
- Check your medication list: potassium balance can be affected by several common prescriptions.
- Prefer simple labels: one mineral, clear serving size, and a reputable seller are enough.
- Be careful with powders: measuring accuracy matters more with potassium than with many other supplement categories.
- Do not stack blindly: electrolyte powders, salt substitutes, multivitamins, and potassium capsules can all add up.
Products We Would Be Careful With
We scored higher-dose powders and bicarbonate products more conservatively because they ask more from the buyer. They can make sense for careful users, but they are easier to misuse than a standard low-dose capsule. If you want the lowest-friction choice, stay with NOW, Nutricost, Nature Made, or Thorne.
FAQ
What is the best potassium supplement?
NOW Potassium Citrate is our top pick for most readers because it is simple, low-dose, affordable, and easy to buy through Amazon. Nutricost is the budget citrate pick, while Thorne is the premium option.
Should I take potassium every day?
Only if the label directions and your personal situation support it. Many people are better served by improving food intake. If you use medication or monitor electrolytes, get personalized guidance first.
Why do many potassium pills only have 99 mg?
Many mainstream potassium capsules use modest doses because higher supplemental potassium requires more caution. The low number surprises people, but it is one reason food sources matter so much.
Is potassium citrate better than potassium gluconate?
Not always. Citrate is common and easy to compare, while gluconate is common in drugstore-style tablets. The better choice depends on dose, label clarity, tolerance, price, and your reason for using it.
Who should avoid potassium supplements?
People with kidney concerns, certain heart concerns, or medications that raise potassium need professional guidance before using potassium supplements. When in doubt, food-first is the safer default.
Bottom Line
NOW Potassium Citrate is the best overall pick for most readers because it is simple, affordable, and easy to buy with a clean Amazon affiliate link. Nutricost is the value citrate pick, Nature Made is the familiar drugstore-style option, and Thorne is the premium pick. Keep the bigger point in mind: potassium is a diet-first mineral, and supplements should stay modest unless you have personalized guidance.
Sources
- NIH Office of Dietary Supplements potassium consumer fact sheet
- NCBI Bookshelf dietary reference intakes for potassium safety
- NHLBI getting more potassium fact sheet
- USDA FoodData Central
- FDA dietary supplement consumer guidance
