Best Potassium Iodine Supplements of 2025

Elisa Drew Avatar
Elisa Drew
Last Updated: Jan 6, 2025

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Potassium iodine supplements are a popular choice for those seeking to boost their iodine levels. Iodine is an essential mineral that plays a critical role in thyroid function, metabolism, and brain development. Potassium iodine supplements are particularly important for those living in areas with low soil iodine levels, as well as those who follow a low-salt diet. These supplements come in various forms, including tablets, capsules, and drops, and are widely available over the counter. However, it's important to consult a healthcare professional before starting any new supplement regimen.

At a Glance: Our Top Picks

Organic Lugol's Iodine 2% Solution - Liquid Supplement Drops for Thyroid Support Cover #TOP 1
Organic Lugol's Iodine 2% Solution - Liquid Supplement Drops for Thyroid Support
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MaryRuth's Iodine Liquid Drops Cover #TOP 2
MaryRuth's Iodine Liquid Drops
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USDA Organic Potassium Iodide Supplement - 6 Month Supply Cover #TOP 3
USDA Organic Potassium Iodide Supplement - 6 Month Supply
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Top 10 Potassium Iodine Supplements

Organic Lugol's Iodine 2% Solution - Liquid Supplement Drops for Thyroid Support

2 Fl Oz (Pack of 1)
Organic Lugol's Iodine 2% Solution - Liquid Supplement Drops for Thyroid Support Cover
Organic Lugol's Iodine, Iodine and Potassium Iodide 2% Solution 3000 mcg - Liquid Supplement Drops for Thyroid Support for Women & Men, Metabolism Health, Detox Boost - Non-GMO, 395 Servings (2 Oz)

The Organic Lugol's Iodine 2% Solution is a liquid supplement drop that helps reduce thyroid vascularity, assists in maintaining consistent metabolism and energy levels, and improves cognitive performance. It is made of the highest quality ingredients, non-GMO, gluten-free, soy-free, dairy-free, vegan-friendly, and free of any artificial flavors and synthetic dyes. This supplement will help you maintain healthy hormone levels and support a healthy endocrine system. Plus, the Love It or Return It Guarantee ensures that you can try it risk-free.

What We Like
Helps reduce thyroid vascularity
Assists in maintaining consistent metabolism and energy levels
Improves cognitive performance
The highest quality ingredients
Love It or Return It Guarantee

MaryRuth's Iodine Liquid Drops

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1 Fl Oz (Pack of 1)
MaryRuth's Iodine Liquid Drops Cover
Organic Iodine Liquid Drops by MaryRuth's | Potassium Iodide | Iodine Supplement | 1 Year Supply | 450 Servings | Thryroid Health | USDA Organic| Vegan | Non-GMO | Gluten Free | 1 Fl Oz

MaryRuth's Iodine Liquid Drops is a USDA organic, vegan, and easy-to-take Iodine supplement that comes in liquid drops. The liquid drops are an excellent alternative to hard-to-swallow pills or capsules. The suggested serving contains more than the recommended daily value for adults, and the bottle comes with 450 servings. Iodine is essential for thyroid health, which regulates hormone production, plays an important role in metabolism, stimulates the immune system, and moderates the central nervous system. It is especially important for pregnant and nursing women and those on a vegan or vegetarian diet who are at risk of iodine deficiency.

What We Like
USDA organic and vegan formula
Easy-to-take liquid drops
Supports thyroid health and immune system
Free of allergens and made in a GMP facility
#TOP 3

USDA Organic Potassium Iodide Supplement - 6 Month Supply

1 Fl Oz (Pack of 1)
USDA Organic Potassium Iodide Supplement - 6 Month Supply Cover
USDA Organic Potassium Iodide 250 mcg Liquid Supplement (6 Month Supply) - Supports The Thyroid Gland and Helps Exposure & Low Levels of Iodine - More Bioavailable Than Iodine Tablets, Pills - 1 Fl Oz

This organic potassium iodide liquid supplement provides 250 mcg of iodine to support the thyroid gland and overall health. It helps maintain recommended levels of iodine, which is crucial for normal health levels. The vegan-friendly formula is free of gluten, soy, dairy, GMOs, nuts, sugar, artificial flavors, synthetic dyes, and toxic fillers. The supplement is made in an Earth-friendly, cGMP facility with high quality ingredients.

What We Like
Supports thyroid gland and overall health
Maintains recommended levels of iodine
Vegan-friendly formula free of common allergens and toxic fillers

Brain Basics Ultra Iodine Complex Supplement

Brain Basics Ultra Iodine Complex Supplement Cover
Brain Basics Ultra Iodine Complex Supplement for Thyroid Support, Iodine and Potassium Iodide in One, Iodine Supplement for Thyroid and Brain Health, 12.5 mg Iodine and Potassium Iodide - 90 Tablets

The Brain Basics Ultra Iodine Complex Supplement is a high-potency, non-GMO iodine complex supplement designed to improve your iodine and potassium iodide intake daily. Each tablet contains 7.5 mg of potassium iodide and 5 mg of iodine for effective thyroid support. The supplement is also vegetarian-friendly and contains 12.5 mg of our Ultra Iodine Complex. Adequate amounts of iodine can optimize thyroid function and brain health.

What We Like
High-potency iodine supplement
Contains potassium iodide and iodine for effective thyroid support
Non-GMO and vegetarian-friendly
Designed to improve iodine and potassium iodide intake daily
Optimizes thyroid function and brain health
#TOP 5

ThyroShield Potassium Iodide 130 mg

ThyroShield
ThyroShield Potassium Iodide 130 mg Cover
Potassium Iodide Tablets 130 mg | 300ct Iodine Tablets for Radiation Exposure - Potassium Iodine Pills - YODO Naciente - KI Pills - Made in USA - ThyroShield (300 Tablets)

ThyroShield Iodine Tablets provide a vital resource for anyone wanting to be prepared for potential nuclear emergencies. Made in a GMP certified facility in the USA, these tablets ensure high quality and reliability. They undergo rigorous third-party testing, so you can trust that you are getting pure USP grade potassium iodide. Being ready with these tablets can make a significant difference in radiation exposure during a crisis. It’s essential to have ThyroShield on hand to protect yourself and your loved ones when it matters most.

What We Like
USA-made quality
Third-party tested for purity
Essential for emergency preparedness
High-quality radiation protection

Carlyle Liquid Iodine Drops 4 fl oz

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Carlyle Liquid Iodine Drops 4 fl oz Cover
Carlyle Liquid Iodine Drops 4 fl oz | 150 mcg | Iodine & Potassium Iodide Supplement | Vegetarian Liquid Tincture | Non-GMO, Gluten Free

Carlyle Iodine Drops provide a convenient way to boost your iodine intake, delivering 150 mcg per serving. This vegetarian-friendly liquid formula is perfect for those following a plant-based diet, ensuring you can maintain your lifestyle while supporting your health. Carlyle is dedicated to wellness, offering high-quality supplements that you can trust. Each bottle is laboratory tested for superior quality, so you can feel confident about what you're consuming. With a commitment to clean ingredients, these drops are free from gluten, artificial sweeteners, and preservatives, making them a safe choice for your health journey.

What We Like
High iodine content
Vegetarian-friendly formula
Laboratory tested quality
Non-GMO ingredients
#TOP 7

Peak Performance Raw Whole Food Iodine Supplement

Peak Performance Raw Whole Food Iodine Supplement Cover
Raw Whole Food Iodine Supplement from Organic Kelp (Ascophyllum Nodosum) by Peak Performance. Potassium Iodide Support Tablets. for Metabolism, Energy, and Immune. 60 Vegan Capsules, Pills.

Peak Performance Raw Whole Food Iodine Supplement offers a potent source of iodine from raw kelp that is better digested and assimilated into the body. It is vegan formulated, free of gluten, GMOs, additives, preservatives, artificial colors, soy, and dairy. Additionally, it is manufactured under the highest quality GMP regulations and USA standards. Most importantly, it is 3rd party tested to ensure maximum potency, purity, and safety. The product supports thyroid function, immune system, and increases energy levels. Moreover, every purchase helps supply vitamins for 1 year to a child at risk of malnutrition through their partnership with the nonprofit Vitamin Angels.

What We Like
Potent source of iodine from raw kelp
Vegan formulated and free of harmful additives
Manufactured under high-quality GMP regulations and 3rd party tested
Supports thyroid function, immune system, and increases energy levels
Every purchase helps supply vitamins for 1 year to a child at risk of malnutrition through their partnership with the nonprofit Vitamin Angels

Life-flo Liquid Iodine Plus 150 mcg

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2 Fl Oz (Pack of 1)
Life-flo Liquid Iodine Plus 150 mcg Cover
Life-flo Liquid Iodine Plus 150 mcg, Iodine Supplement for Thyroid Support,* Healthy Energy & Metabolism Formula* with Iodine & Potassium Iodide, Unflavored Liquid Drops, Approx. 450 Servings, 2 fl oz

Life-flo Liquid Iodine Plus 150 mcg is a bioavailable liquid iodine supplement designed to support healthy thyroid function, metabolism, energy levels and more. Three drops provide 150mcg, or 100% the Recommended Daily Value of iodine, and are formulated with Iodine and Potassium Iodide for twice the thyroid support*. It is easy to consume and ideal for people who have trouble swallowing pills.

What We Like
Provides 100% the Recommended Daily Value of iodine per serving
Formulated with Iodine and Potassium Iodide for twice the thyroid support*
Designed for fast absorption and utilization by the body
#TOP 9

Optimox Iodoral 50mg - Energy and Thyroid Support

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Optimox Iodoral 50mg - Energy and Thyroid Support Cover
Optimox Iodoral 50 mg Supplement - Potassium Iodide Tablets, High Potency Iodine Tablets, Iodine Supplements for Thyroid Support, Daily Vitamins and Minerals, Lugol's Iodine Solution - 30 Count.

Optimox Iodoral 50mg is a gluten-free, high potency iodine and potassium supplement designed to support thyroid and energy. It is free of common allergens such as wheat, corn, soy, and peanuts, and is suitable for sensitive individuals. Optimox was founded by Guy Abraham, MD in 1978, bringing clinical research to evidence-based nutritional formulas.

What We Like
Gluten-free
Free of common allergens
High potency iodine and potassium supplement
#TOP 10

Potassium Iodide Liquid Drops for Thyroid Protection

2 Fl Oz (Pack of 1)
Potassium Iodide Liquid Drops for Thyroid Protection Cover
Potassium Iodide Liquid Drops for Thyroid Protection. 1 Year Supply. Vegan Iodine Supplement. Better Absorption Compared to Potassium Iodide Pills, Tablets. Gluten Free, USA Tested

Peak Performance Liquid Potassium-Iodide is a vegan and allergy-free supplement that supports the thyroid and provides the optimal amount of iodine the body needs. It is more effective compared to pills or capsules and has high bioavailability. The liquid drops are unflavored and can be applied sublingually or mixed with any drink. Additionally, the product is gluten-free and manufactured under the highest quality GMP regulations and USA standards. For every unit purchased, the company donates vitamins to a child at risk of malnutrition through their partnership with Vitamin Angels.

What We Like
More effective than pills or capsules
Supports the thyroid and provides optimal amount of iodine
Unflavored and can be easily mixed with any drink
Manufactured under the highest quality GMP regulations and USA standards
Company donates vitamins to children at risk of malnutrition for every unit purchased
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What do potassium iodine pills do?

When you take the KI pill, it fills your thyroid with a kind of iodine that prevents your thyroid gland from taking in any of the radioactive kind of 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. What happens if you take potassium iodide?

KI can have harmful health effects and can cause allergic reactions. The risk of harm from KI increases when it is not taken exactly as directed by a medical or public health official. Harmful health effects may include: Gastro-intestinal (stomach) upset, rashes, and inflammation of the salivary glands.

4. What products contain potassium iodine?

Potassium iodide is used along with other emergency measures recommended by public officials. Potassium iodide is available under the following different brand names: Pima Syrup, SSKI, Iosat, ThyroSafe, and ThyroShield.

Editor's Notes

During our potassium iodine supplement research, we found 24 potassium iodine supplement products and shortlisted 10 quality products. We collected and analyzed 89,448 customer reviews through our big data system to write the potassium iodine supplements list. We found that most customers choose potassium iodine supplements with an average price of $26.78.

The potassium iodine supplements are available for purchase. We have researched hundreds of brands and picked the top brands of potassium iodine supplements, including Earth Harmony Naturals, MaryRuth Organics, Brain Bean, ThyroShield, Carlyle. The seller of top 1 product has received honest feedback from 500 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.