ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

About ConsumerLab.com


Potassium Supplements reviewed by ConsumerLab.com

Summary

  • What does potassium do?

    Potassium is a mineral and electrolyte that is essential for the proper functioning of the nervous system, skeletal system, heart, and metabolism, as well as maintaining normal blood pressure (see What It Is). Symptoms of potassium deficiency can include muscle weakness, irregular heartbeat, listlessness, mood changes, irrational behavior, nausea, and vomiting.
  • Do I need to take a potassium supplement?

    Potassium supplements are typically used only to treat or prevent potassium deficiency. Sufficient amounts of potassium can easily be obtained through the diet, but people taking certain drugs or with conditions affecting the kidneys or gut may be deficient (see What to Consider When Using). Low potassium is also common among people hospitalized with COVID-19. Supplementing with potassium may also help to reduce high blood pressure. The citrate form of potassium may also reduce the risk of kidney stones (see What It Does).
  • How much potassium should I take?

    For preventing potassium loss, potassium is often recommended at doses of 200 to 400 mg, taken 3 to 4 times daily (for a total daily dose ranging from 600 mg to 1,600 mg). For lowering blood pressure in people with hypertension, larger amounts are often used (3,000 mg per day) (see What to Consider When Using). Nearly all common forms of potassium are absorbed equally well (see What to Consider When Buying).
  • Best potassium supplement?

    As discussed in What CL Found, problems were found with potassium supplements. One could cause you to take 2.5 times as much potassium as you might expect from its label. Pills of the other product would not fully break apart within the allotted time, suggesting the ingredients might be less available for absorption. None of the products exceeded limits for contamination with heavy metals (lead, cadmium, and arsenic), unlike our findings in 2016 when we discovered a significant amount of arsenic in a potassium supplement.

    Among the products that passed testing, ConsumerLab.com chose three Top Picks.
  • Safety and side effects of potassium supplements:

    Potassium from supplements may cause diarrhea, nausea, stomach pain, mild gas and vomiting, which may be reduced by taking with meals. Less common side effects include confusion, irregular heartbeat and shortness of breath. People with kidney disease and people taking potassium-sparing diuretics, ACE inhibitors, or trimethoprim/sulfamethoxazole should not take potassium supplements without medical supervision(see Concerns and Cautions).

Make sure you're choosing the best potassium supplements approved in our tests!

See the Full Review as a Member

Join now at www.consumerlab.com/join/

Alphabetical list of potassium supplement brands compared in this report

View Larger Image 7469_large_Bluebonnet-Potassium-2021.png

Bluebonnet Potassium 99 mg

View Larger Image 7470_large_BulkSupplements-Potassium-2021.png

BulkSupplements.com Potassium Chloride

View Larger Image 7468_large_CVSHealth-Potassium-2021.png

CVS Health Potassium Gluconate 595 mg

View Larger Image 7461_large_DesignsForHealth-Potassium-2021.png

Designs For Health K+2 Potassium

View Larger Image 7472_large_HEB-Potassium-2021.png

H-E-B Potassium Gluconate

View Larger Image 7463_large_MembersMark-Potassium-2021.png

Member's Mark Potassium

View Larger Image 7464_large_NaturesWay-Potassium-2021.png

Nature's Way Krebs Magnesium Potassium Complex

View Larger Image 7465_large_NOW-Potassium-2021.png

NOW Potassium Chloride Powder

View Larger Image 7467_large_PuritansPride-Potassium-2021.png

Puritan's Pride Potassium 99 mg

View Larger Image 7471_large_Rexall-Potassium-2021.png

Rexall Potassium 99 mg

View Larger Image 7460_large_Swanson-Potassium-2021.png

Swanson Potassium Citrate

View Larger Image 7462_large_TwinLab-Potassium-2021.png

TwinLab Potassium Caps

View Larger Image 7466_large_Vitacost-Potassium-2021.png

Vitacost Potassium & Magnesium

You must be a ConsumerLab.com member to get the full test results along with ConsumerLab.com's recommendations and quality ratings of potassium supplements — including potassium-magnesium combinations. You will get results for 13 supplements — 10 selected by ConsumerLab.com and three which passed testing in our voluntary Quality Certification Program.


In this comprehensive review, you'll discover:
  • Which potassium supplements passed or failed our testing
  • CL's Top Picks among potassium supplements for quality and value
  • The pros and cons of different forms of potassium (such as potassium chloride, potassium citrate, and potassium gluconate) and dosage forms (such as pills and powders) 
  • Dosing of potassium for specific uses
  • How to avoid being misled by labels on potassium supplements  
  • Food sources of potassium  
  • Potential side-effects and concerns with potassium 

Join to unlock the full report and get full access to over 1,400 reviews

See the Full Review as a Member

Join now at www.consumerlab.com/join/

Close
Additional Information
Tested through CL's Quality Certification Program prior to, or after initial posting of this Product Review.