Best Iodine Potassium Supplements of 2026

Elisa Drew Avatar
Elisa Drew
Last Updated: Jan 23, 2026

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Iodine potassium supplements are becoming increasingly popular among health enthusiasts due to their numerous health benefits. These supplements are formulated with a blend of iodine and potassium, two essential minerals that play a crucial role in maintaining optimal health. Iodine is essential for thyroid function, while potassium is important for maintaining healthy blood pressure levels. Together, these minerals support a healthy metabolism, promote healthy brain function, and enhance overall energy levels. Iodine potassium supplements are available in various forms, including capsules, tablets, and liquid drops, making them easily accessible to people of all ages and lifestyles.

At a Glance: Our Top Picks

Optimox Iodoral 12.5 mg Cover #TOP 1
Optimox Iodoral 12.5 mg
ftb score rating icon 9.8
Nature's Bounty Potassium Gluconate 99 mg, 100 Caplets Cover #TOP 2
Nature's Bounty Potassium Gluconate 99 mg, 100 Caplets
ftb score rating icon 9.7
NOW Supplements Potassium Citrate Capsules Cover #TOP 3
NOW Supplements Potassium Citrate Capsules
ftb score rating icon 9.5

Top 10 Iodine Potassium Supplements

Optimox Iodoral 12.5 mg

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Optimox Iodoral 12.5 mg Cover
ARG Optimox Iodoral 12.5 mg - Iodine & Potassium Iodide Supplement for Thyroid & Metabolic Balance Support - Free of Soy & Gluten - 90 Servings - 90 Tablets

Optimox Iodoral is a high potency iodine nutritional supplement that provides support for your thyroid and energy levels. With a comparable amount of iodine to the average daily intake by mainland Japanese, this supplement is designed to promote normal, healthy thyroid function. By supporting your thyroid, Optimox Iodoral can help regulate your metabolism and energy levels, giving you the boost you need to tackle your day. Additionally, this supplement is free of common allergens, making it suitable for individuals with sensitivities. Established in 1978, Optimox is a trusted brand that brings clinical research to their evidence-based nutritional formulas. Trust Optimox Iodoral for your thyroid and energy support needs.

What We Like
High potency iodine supplement
Supports normal, healthy thyroid function
Allergen-free formula

Nature's Bounty Potassium Gluconate 99 mg, 100 Caplets

Nature's Bounty Potassium Gluconate 99 mg, 100 Caplets Cover
Nature's Bounty Potassium 99mg, Supports Fluid Balance and Muscle Activity, Involved in Normal Heart Function, Potassium Gluconate Dietary Supplement, Gluten Free, 1 Per Day, 100 Vegetarian Caplets

Nature's Bounty Potassium Caplets are an essential mineral supplement that supports fluid balance, muscle activity, and normal heart function. Potassium is needed by the body for mineral balance in the blood and muscle activity. With an easy dose of just one vegetarian caplet a day, Nature's Bounty Potassium Caplets offer convenience and benefits to users. By supporting fluid balance, it can help regulate blood pressure. By supporting muscle activity, it can help prevent cramping during exercise. By supporting normal heart function, it can help maintain a healthy cardiovascular system.

What We Like
Improves sleep quality
Reduces muscle cramps
Effective for nighttime relief

NOW Supplements Potassium Citrate Capsules

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NOW Supplements Potassium Citrate Capsules Cover
NOW Foods Supplements, Potassium Citrate 99 mg, Supports Electrolyte Balance and Normal pH*, Essential Mineral, 180 veg Capsules

Get your essential mineral with NOW Supplements Potassium Citrate Capsules. This supplement supports electrolyte balance and normal pH, critical for maintaining fluid levels, acid-base balance, muscle contraction, healthy heart function, and nerve impulses. The well-absorbed and highly bioavailable form of potassium comes in 180 veg capsules, and is kosher, soy-free, vegan, nut-free, gluten-free, dairy-free, and egg-free. NOW is a family-owned and operated company since 1968, assuring quality with NPA A-rated GMP certification. Take 1 capsule 1 to 5 times daily with food.

What We Like
High quality and consistent
Effective for muscle cramps
Affordable price
Easy to swallow capsules
Supports workout recovery

Nature Made Potassium Gluconate 550 mg

Nature Made Potassium Gluconate 550 mg Cover
Nature Made Potassium Gluconate 550 mg, Potassium Supplements, Dietary Supplement for Heart Health Support, 100 Tablets, 100 Day Supply

Nature Made Potassium Gluconate 550 mg is a dietary supplement designed to support heart health. Each bottle contains 100 tablets, providing a 100-day supply. These tablets help maintain fluid balance and support nerve, muscle, and heart function. With 90 mg of potassium per tablet, this supplement ensures your body gets the essential mineral it needs to function properly. Taking just one tablet daily with water and a meal is all it takes to reap the benefits. This gluten-free supplement is also free from artificial flavors, colors, and preservatives. Nature Made is the number one pharmacist recommended vitamin and supplement brand in the United States, and this product is USP verified. Please note that these statements have not been evaluated by the FDA and the product is not intended to diagnose, treat, cure, or prevent any disease.

What We Like
Effective for muscle cramps
Easy to swallow tablets
Affordable price
Gentle on stomach
USP verified quality
#TOP 5

Nutricost Potassium Citrate 99mg, 500 Capsules

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Nutricost Potassium Citrate 99mg, 500 Capsules Cover
Nutricost Potassium Citrate 99mg, 500 Capsules

Nutricost Potassium Citrate 99mg comes in a bottle of 500 capsules, with each capsule providing a maximum serving size of 99mg of Potassium. It is Non-GMO, Gluten Free, Soy Free, and 3rd Party Tested. The product is made in a GMP Compliant, FDA Registered Facility, and the lid may be blue or white. Remember not to exceed the recommended serving size.

What We Like
Leg cramp relief
Muscle recovery support
Gentle on stomach
Long-lasting supply
Affordable and cost-effective
#TOP 6

HEALTH LFE Potassium Iodide Tablets 130 mg

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HEALTH LFE Potassium Iodide Tablets 130 mg Cover
Potassium Iodide130 mg - KI Tablets- Potassium130 mg - USA Made Potassium Iodine Pills YODO Naciente, Yoduro de potasio - 120 Tablets

HEALTH LFE Potassium Iodide is a dietary supplement that comes in a bottle of 120 tablets, each containing 130 mg of potassium iodide, intended for short-term use. This product is free from common allergens such as yeast, gluten, and dairy, making it suitable for various dietary needs. It is also tested by third parties for heavy metals and purity, ensuring you receive a safe product. These tablets are ideal for emergency kits, offering peace of mind during unexpected situations. Remember to consult your physician before use, especially if you have specific health conditions.

What We Like
Allergen-free formula
Third-party lab tested
Emergency preparedness
Short-term use
#TOP 7

Life Enhancement Potassium Supplement

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Life Enhancement Potassium Supplement Cover
Life Enhancement High Absorption Potassium Supplement for Muscle, Brain & Bone Health - No Additives High Potency Elemental Potassium Supplement is Made in USA (240 Capsules – 120 Servings)

Life Enhancement Potassium Supplement provides 1020mg of pure potassium bicarbonate in each serving to boost your daily potassium intake. This supplement helps to support the complete health and total well-being of your entire body. The veggie capsules are easy-to-swallow and contain less than 1% Magnesium Stearate. Life Enhancement is a trusted brand that has been creating and manufacturing supplements for over 25 years.

What We Like
Relieves muscle cramps
Supports normal blood pressure
No additives or fillers
Easy-to-swallow capsules
Made in the USA

Nature Made Potassium Gluconate 550mg

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Nature Made Potassium Gluconate 550mg Cover
Nature Made Potassium Gluconate 550mg, 100 tablets

Nature Made Potassium Gluconate is a potassium supplement that offers a range of benefits for your overall health. This supplement helps control the activity of the heart muscle, ensuring its proper functioning. Additionally, it helps regulate water balance within the body, which is crucial for maintaining hydration levels. Nature Made Potassium Gluconate is free from chemical solvents, yeast, starch, and gluten, making it a suitable choice for individuals with specific dietary needs. With Amazon's careful shipping practices, you can trust that the product will arrive in optimal condition. Improve your heart health and water balance with Nature Made Potassium Gluconate.

What We Like
Affordable price
Fast shipping
Relieves leg cramps
Reduces fatigue
Better than store options
#TOP 9

NaturalSlim Kadsorb Natural Potassium Citrate Supplement

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NaturalSlim Kadsorb Natural Potassium Citrate Supplement Cover
NaturalSlim Natural Potassium Citrate Gluconate 99 mg - Kadsorb Supports Electrolyte Balance & Normal pH - Absorbable Potassium Supplements with Essential Minerals - Non GMO 400 Capsules 1 Pack

NaturalSlim Kadsorb Natural Potassium Citrate Supplement is a unique and absorbable type of potassium citrate that helps to reduce acidity and supports electrolyte balance and normal pH. It helps to speed up your metabolism, keeps bodily systems in good condition, and supports your blood, bone, and muscle. You can pair it with magnesium supplements for extra health benefits. With 99mg and 400 capsules, this non-GMO and gluten-free supplement is a great source of essential macrominerals for your health.

What We Like
Easy to swallow capsules
No unpleasant aftertaste
Clear dosage instructions
Natural and well-packaged
Supports electrolyte balance
#TOP 10

Pure Encapsulations Potassium (Citrate) | 180 Capsules

Pure Encapsulations Potassium (Citrate) | 180 Capsules Cover
Pure Encapsulations Potassium (Citrate) - Essential Electrolyte Supplement to Support Nerve & Muscle Function, Adrenals, Hormones, Heart Health & Energy* - Potassium Citrate Capsule - 180 Capsules

Pure Encapsulations Potassium (Citrate) is an essential electrolyte supplement that supports nerve and muscle function, adrenals, hormones, heart health, and energy. It offers overall physiological support, maintains electrolyte balance, and promotes cardiovascular function. The supplements are made with premium ingredients, guided by nutritional experts, and verified for potency and purity. The product is free from wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.

What We Like
No additives
Effective muscle cramp relief
Easy to swallow
Better absorption
Affordable price
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Frequently Asked Questions (FAQs)

1. What is potassium iodine pills used for?

Potassium iodide is used to treat overactive thyroid and to protect the thyroid gland from the effects of radiation from inhaled or swallowed radioactive iodine.

2. Can you take iodine and potassium together?

Most iodine supplements contain potassium. Taking potassium iodide along with some medications for high blood pressure might cause too much potassium in the body. Do not take potassium iodide if you are taking medications for high blood pressure.

3. When should I take potassium iodine?

KI protects only against radioactive iodine and does not protect against other types of radiation. KI protects only the thyroid. KI does not protect other parts of the body. KI must be taken within 24 hours before or 4 hours after exposure to be most effective.

4. Is iodine potassium the same as iodine?

Potassium iodide (KI) is the same form of iodine used to iodize table salt. KI floods the thyroid with iodine, thus preventing radioactive iodine from being absorbed. If taken at the proper time, KI protects the thyroid from radioactive iodine from all sources – air, food, milk, and water.

Editor's Notes

During our iodine potassium supplement research, we found 24 iodine potassium supplement products and shortlisted 10 quality products. We collected and analyzed 405,475 customer reviews through our big data system to write the iodine potassium supplements list. We found that most customers choose iodine potassium supplements with an average price of $15.82.

The iodine potassium supplements are available for purchase. We have researched hundreds of brands and picked the top brands of iodine potassium supplements, including Optimox, Nature's Bounty, NOW Foods, Nature Made, Nutricost. The seller of top 1 product has received honest feedback from 48,289 consumers with an average rating of 4.9.

Written by
Elisa Drew Avatar

Elisa Drew is a really professional copywriter specializing in baby products with five years of experience working as a pediatrician once. She has published a series of baby books purchased by over thirty thousand people in the United States.