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The Best Potassium Supplements for Alleviating Cramps and Fatigue

Omair Khaliq Sultan
Written By Omair Khaliq Sultan
Writer + Editor
Last updated: Feb 18, 2025, 04:27 AM
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best potassium supplements

The average person tends to not think too much about potassium, and for people wanting to top up on electrolytes, it’s usually overshadowed by its more popular counterpart, sodium. However, potassium plays a pretty pivotal role in maintaining regular body function, with effects on heart health and blood pressure. While most people can obtain adequate potassium through a balanced diet, certain folks can definitely benefit from supplementation. After some research, the Nutricost Potassium Supplement came out on top, but there are a bunch of other good options to consider too.

 
 
 
 
 
 
View all Contents
  • How to Pick the Right Potassium Supplement
      • The Importance of Potassium
      • When to Consider Potassium Supplements
    • Different Forms of Potassium Supplements
      • Factors to Consider Before Checkout
      • Safety and Precautions
      • Incorporating Potassium Through the Diet
      • Potassium Deficiency Symptoms
      • Potassium Supplement Comparison Table
  • Potassium Supplement FAQs
  • Building a Stronger You
  • Contributors
  • Related Reads

Top Potassium Supplements

  • Nutricost Potassium Supplement: Best Overall (Shop Now) →
    Read more about this potassium supplement ↓
  • Life Enhancement Potassium Supplement: High Potency (Shop Now) →
    Read more about this potassium supplement ↓
  • MD.Life Potassium Supplement: Best For Nighttime Use (Shop Now) →
    Read more about this potassium supplement ↓
  • Univera km Liquid Potassium Supplement: Best Liquid Potassium Supplement (Shop Now) →
    Read more about this potassium supplement ↓
  • MaryRuth Organics Potassium Iodide: Best Potassium Iodide (Shop Now) →
    Read more about this potassium supplement ↓

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A Closer Look At the Best Potassium Supplements of 2025

Nutricost Potassium Supplement

Best Overall
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The Nutricost Potassium Supplement is an excellent product that provides a good amount of potassium citrate to round out your daily intake. The ingredient list is short and sweet, with no GMOs, gluten, or soy. It’s also always refreshing to see supplement manufacturers perform their due diligence by ensuring the product facility is GMP-compliant and that the supplement itself has been verified by an independent lab.

This potassium supplement gets the top spot on the list because of its clean ingredient list, amazing value for money, and the peace of mind you get when consuming a third-party-tested supplement.

Why It’s a Best Seller
  • Short ingredient list
  • Independently tested for accuracy
  • Amazing value for money
What Could Be Better
  • Dosage may be too low for some

Life Enhancement Potassium Supplement

High Potency
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If you’re an athlete looking to get a bit more than the standard dose, or maybe your doctor has recommended amping up your potassium intake for medical reasons, this USA-made potassium supplement provides a substantial 22% of the daily recommended value in one serving. The capsules are vegetarian-friendly and pretty easy to swallow. 
Overall, this is a budget-friendly potassium supplement with higher dosage than other competing products.

Why It’s a Best Seller
  • Higher potency than your average potassium supplement
  • Great value for money
  • Pills are easy to swallow
What Could Be Better
  • Might cause upset stomach if you don’t need a lot of extra potassium

MD.Life Potassium Supplement

Best For Nighttime Use
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Whether you need nutrient support for your vascular health or suffer annoying leg cramps in bed, the MD.Life Potassium Supplement is for you. It has a potent combo of magnesium and potassium, to help regulate your nervous system, improve sleep, and reduce cramping, which makes it fantastic to take when winding down for the day. The capsules are vegan, non-GMO, and don’t contain any gluten, making them suitable for a variety of dietary restrictions. Lastly, this supplement is manufactured in a GMP-compliant facility and has gone through independent testing for authenticity.

Why It’s a Best Seller
  • Potent formula
  • Magnesium helps you sleep
  • Third-party testing for safety and quality
What Could Be Better
  • The included magnesium may not be suitable for everyone

Univera km Liquid Potassium Supplement

Best Liquid Potassium Supplement
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This liquid potassium supplement by Univera presents an interesting approach to potassium supplementation by combining minerals and botanical extracts. Its unique formulation distinguishes it from standard potassium supplements, and the inclusion of botanicals like chamomile, dandelion, and sarsaparilla suggests potential benefits such as improved digestive health and potassium absorption.  

Overall, if you want to experience something a bit different than the standard potassium supplement capsules or have trouble swallowing pills, this liquid potassium mixture is worth a try.

Why It’s a Best Seller
  • Liquid form can be easier to get down for some people
  • Includes additional botanical ingredients for health
  • Better absorption than capsules
What Could Be Better
  • Doesn’t taste great

MaryRuth Organics Potassium Iodide

Best Potassium Iodide
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If you’re pregnant or have thyroid problems and your doctor has recommended that you supplement with potassium iodide, this product by MaryRuth Organics is the most popular option on Amazon by a wide margin. Thanks to the liquid form and convenient dropper, taking the supplement is a pain-free experience. For those concerned about allergens or other worrisome additives, the formulation is simple and free of common allergens, artificial flavors, and sweeteners.

Why It’s a Best Seller
  • Easy-to-take liquid form
  • Vegan and allergen-free formula
  • Tolerable taste
What Could Be Better
  • Iodine isn’t for everyone and shouldn’t be taken casually

How to Pick the Right Potassium Supplement

Potassium is a vital electrolyte and an indispensable mineral for optimal bodily function. It plays a crucial role in numerous physiological processes, and while most people can obtain adequate potassium through a balanced diet rich in fruits, vegetables, and whole grains, certain groups may benefit from supplementation.

The Importance of Potassium

Potassium is essential for maintaining overall health. Its key functions include:

  • Blood pressure regulation: Potassium effectively counterbalances the blood pressure-raising effects of sodium, helping to prevent hypertension and its associated complications.
  • Heart health: Maintains a regular heartbeat, reduces the risk of heart disease, and supports overall cardiovascular health by helping to prevent arrhythmias and heart attacks.
  • Muscle function: Crucial for muscle contraction and relaxation, preventing cramps, spasms, and fatigue.
  • Bone health: Contributes to bone mineral density, reducing the risk of osteoporosis and fractures.
  • Digestive health: Supports normal bowel function, aiding digestion and preventing constipation.
  • Electrolyte balance: Maintains optimal electrolyte balance alongside sodium and magnesium, essential for proper nerve function, muscle contraction, and fluid balance.

When to Consider Potassium Supplements

While dietary intake is prioritized, some people can benefit from potassium supplementation under medical guidance:

  • If you’ve been diagnosed with hypokalemia (low potassium levels): It is often prescribed by healthcare providers to restore potassium balance.
  • Those taking diuretic medications: These medications can deplete potassium levels, necessitating supplementation.
  • Athletes experiencing excessive sweating: Sweat loss can lead to significant potassium loss, especially in endurance athletes.
  • People with certain medical conditions: Including kidney disease, heart failure, and diabetes, where potassium levels may be compromised.

Crucially, always consult a healthcare professional before initiating any new supplement, including potassium.

Different Forms of Potassium Supplements

Potassium supplements come in various forms, each with its own characteristics and potential benefits:

  • Potassium Chloride: The most common and often less expensive form, but may cause gastrointestinal upset in some individuals.
  • Potassium Citrate: Generally better tolerated and may help prevent kidney stones.
  • Potassium Gluconate: Often gentle on the digestive system, suitable for those with sensitive stomachs.
  • Potassium Bicarbonate: Offers alkaline properties, beneficial for acid reflux and pH balance.
  • Potassium Aspartate: Often combined with other nutrients, potentially enhancing absorption.
  • Potassium Iodide: Primarily used for thyroid health, but also provides potassium.

While these forms offer different advantages, it’s essential to consult with a healthcare professional to determine the most suitable option for your specific needs and health conditions.

Factors to Consider Before Checkout

When selecting a potassium supplement, consider the following factors:

  • Form: Choose based on your individual tolerance and specific needs.
  • Dosage: Adhere to recommended guidelines or consult with a healthcare provider.
  • Independent testing: Look for supplements verified by independent laboratories to ensure purity, potency, and safety.
  • Additional ingredients: Opt for products with minimal added substances like fillers, binders, or artificial additives.
  • Brand reputation: Research the brand’s reputation for quality, reliability, and adherence to good manufacturing practices (GMP).
  • Price: Compare prices while considering the supplement’s quality, dosage, and overall value.

Safety and Precautions

While potassium is essential, excessive intake can lead to hyperkalemia, a potentially serious condition characterized by high potassium levels in the blood. Symptoms include muscle weakness, irregular heartbeat, and numbness. Individuals with kidney disease are particularly susceptible.

Potassium supplements may interact with certain medications, such as diuretics, ACE inhibitors, and potassium-sparing drugs. Always consult your doctor about potential interactions.

Incorporating Potassium Through the Diet

Prioritizing potassium-rich foods is the cornerstone of adequate potassium intake:

  • Fruits: Bananas, avocados, oranges, dried apricots, cantaloupe, kiwi, grapefruit
  • Vegetables: Spinach, sweet potatoes, potatoes, broccoli, mushrooms, tomatoes, carrots
  • Legumes: Lentils, beans, chickpeas, black beans, kidney beans
  • Dairy: Yogurt, milk
  • Whole Grains: Brown rice, quinoa, oats, whole-wheat bread
  • Nuts and Seeds: Almonds, chia seeds, flaxseeds

Potassium Deficiency Symptoms

Recognizing potassium deficiency symptoms is crucial for timely intervention:

  • Fatigue and weakness
  • Muscle cramps and spasms
  • Constipation
  • Irregular heartbeat
  • Numbness or tingling
  • Difficulty concentrating
  • Increased blood pressure

If you experience these symptoms, consult a healthcare provider for proper evaluation and treatment.

Potassium Supplement Comparison Table

FormAdvantagesDisadvantages
Potassium ChlorideAffordable, widely availableMay cause digestive upset
Potassium CitrateGood tolerance, may prevent kidney stonesGenerally more expensive
Potassium GluconateGentle on the stomachOften less potent
Liquid PotassiumRapid absorptionMay have a taste, less convenient
Potassium BicarbonateAlkaline properties, beneficial for acid reflux and pH balanceLess common, consult a healthcare professional before use
Potassium AspartateMay enhance absorption, often combined with other nutrients Limited research on isolated use. Consult a healthcare professional before use
Potassium IodidePrimarily for thyroid health, also provides potassiumHigh iodine intake can be harmful. Consult a healthcare professional before use

Note: This table provides a general overview. Consult a healthcare professional for personalized recommendations.

By understanding the importance of potassium, considering supplement options, and prioritizing dietary intake, you can make informed decisions about your potassium health. Remember, consulting with a healthcare provider is essential for personalized guidance.

Potassium Supplement FAQs

Can I take a potassium supplement daily?

Yes, you can generally take a potassium supplement daily, but you should consult with your healthcare provider first. While potassium is crucial for overall health, excessive intake can lead to hyperkalemia, a condition where potassium levels in the blood are too high. This can have serious consequences.   Factors to consider before taking a potassium supplement daily include:

  • Dietary intake: Many people get enough potassium from their diet.
  • Medical conditions: Certain conditions (like kidney disease) can affect potassium levels.
  • Medications: Some medications may interact with potassium supplements.
Discussing your specific health situation with a healthcare professional can help you determine if a potassium supplement is necessary and the appropriate dosage.

What's the best time to take a potassium supplement?

Generally, it's recommended to take a potassium supplement with food. This helps to minimize any potential digestive upset.

However, the specific timing might vary depending on the type of potassium supplement and your individual needs. It's always best to follow the supplement label's instructions or consult your healthcare provider.

Are there any age restrictions for taking a potassium supplement?

There are no specific age restrictions for taking potassium supplements. However, it's crucial to consult with a pediatrician or healthcare provider before giving any supplements, including potassium, to children.

Children's potassium needs vary based on age, weight, and overall health. A healthcare professional can determine the appropriate dosage and monitor for any potential side effects.

For adults, while there's no general age restriction, it's always advisable to consult with a doctor, especially for older adults or individuals with underlying health conditions.

Can I test my potassium levels at home?

Currently, there are no at-home tests for accurately measuring potassium levels. While some devices can measure other biomarkers, potassium levels require specific laboratory testing. This is usually done through a blood test, which can be performed at a healthcare facility or a designated testing center. If you're concerned about your potassium levels, it's best to consult with a healthcare professional for proper evaluation and testing.

What should I do if I take too much potassium?

If you suspect you've taken too much potassium, it's crucial to seek medical attention immediately. Consuming excessive potassium can lead to hyperkalemia, a condition where potassium levels in the blood are dangerously high. This can have serious consequences, including heart problems.   Symptoms of hyperkalemia can include:

  • Muscle weakness
  • Numbness or tingling
  • Irregular heartbeat
  • Chest pain
  • Shortness of breath
Do not attempt to self-treat hyperkalemia. It's a medical emergency requiring immediate attention.

Building a Stronger You

Supplement Institute is the fruit of extensive online publishing experience, spanning the breadth of SEO strategies to the nuances of paid advertisements. Our journey, marked by significant achievements and learning moments, inspires our core mission: to empower our readers with an abundance of information. By sharing insights and key learnings, we aim to provide you with the knowledge needed to navigate the complex world of supplements, helping you make well-informed decisions for your health and well-being. Welcome to Supplement Institute, where information is your greatest supplement.

Contributors

Omair Khaliq Sultan
Omair Khaliq Sultan
Writer + Editor
Omair is a certified strength coach with a specialization in Powerlifting-style training and sports rehab. He also has a keen interest in tech, music, and cooking. When he's not working, you'll probably find him lifting weights, noodling on his guitar, perfecting his smash burger recipe, or watching tech reviews on YouTube.
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