Top Potassium Iodide Brands: Essential Picks for Optimal Health

When seeking reliable options for potassium iodide, understanding the best brands available in the market is essential for ensuring quality and effectiveness. Potassium iodide is often sought after for its medical and protective benefits, primarily during nuclear emergencies to shield the thyroid gland from radiation exposure. Numerous companies have established themselves as leaders in producing high-quality potassium iodide supplements, each bringing their own unique benefits and certifications. For those eager to explore the top brands prioritizing both safety and efficacy, we invite you to continue reading below.

Illustration of potassium iodide

Best brands of potassium iodide in 2025

iOSAT

iOSAT, a brand by Anbex Inc., is a leading producer of potassium iodide tablets, each containing 65 mg of potassium iodide, which are used to block radioactive iodine from entering the thyroid gland during nuclear radiation emergencies. The tablets are available in packages of 20 and 14 units, with NDC codes 51803-002-01 and 51803-002-02, respectively. iOSAT tablets have been manufactured to meet USP specifications, ensuring a potency of 92.5% to 107.5% of the labeled amount. To learn more about these essential tablets during nuclear emergencies, visit the iOSAT official documentation.

ThyroSafe

ThyroSafe is a renowned brand for potassium iodide tablets, particularly valued for its role in thyroid protection during nuclear radiation emergencies. Each ThyroSafe tablet contains 65 mg of potassium iodide, providing 24-hour protection against radioactive iodine uptake in the thyroid gland. The product is manufactured to strict FDA standards, ensuring high quality and efficacy. ThyroSafe tablets are recommended for use only when advised by public officials and are especially crucial for pregnant and breastfeeding women, infants, and children under 18 years. The tablets have a specified expiration date, such as 06/2032 or later, to ensure their potency.

Potassium Iodide Tablets ANBEX

Potassium Iodide Tablets by ANBEX, specifically the iOSAT™ brand, are highly regarded for their effectiveness in radiation protection. Approved by the FDA in 1982, these tablets contain 130 mg of potassium iodide, which is the full-strength dose recommended for blocking the thyroid's absorption of radioactive iodine. Each tablet is individually foil-sealed for single-unit storage and dosing, ensuring 14 days of protection for adults and up to 28 days for children. ANBEX's iOSAT™ is manufactured in the U.S.A. and is available over-the-counter, with no prescription required. The tablets have a shelf life of 5-7 years when stored properly. For more details, visit the official ANBEX iOSAT Potassium Iodide page.

NOW Foods

NOW Foods is a renowned brand in the health supplement industry, particularly noted for its high-quality potassium iodide products. Their Potassium Iodide Plus supplement provides 225 mcg of iodine and 99 mg of potassium per serving, supporting thyroid function, energy production, and overall cellular metabolism. This product is free from common allergens such as starch, gluten, wheat, yeast, corn, soy, and milk, making it suitable for a wide range of consumers. The supplement is designed to help maintain healthy thyroid hormone production and prevent iodine deficiency, aligning with the daily recommended intake. With its commitment to quality and purity, NOW Foods has established itself as a trusted name in the market.

Life Extension

Life Extension is renowned as one of the best producers of potassium iodide tablets, offering high-quality, science-backed supplements for over 40 years. Their potassium iodide tablets provide 100 mg of stable iodine per 130 mg tablet, ensuring the thyroid gland is saturated with stable iodine. These tablets are vegetarian, gluten-free, and non-GMO, with a shelf life of 24 months. Life Extension's commitment to health and wellness is evident in their 98% customer recommendation rate. Their products are designed for short-term use, particularly in response to official health warnings. For more details on their potassium iodide tablets, visit the Life Extension website.

Pure Encapsulations

Pure Encapsulations is a renowned brand for producing high-quality potassium iodide supplements, designed to provide natural support for the thyroid gland and maintain healthy cellular metabolism. Each capsule contains 225 mcg of iodine as potassium iodide, derived from salt brine, and is hypoallergenic with plant fiber from pine cellulose. The supplements are gluten-free, non-GMO, and recommended to be taken 1-2 times daily with meals. Pure Encapsulations ensures the products are free from common allergens, making them suitable for a wide range of users. This brand is trusted for its commitment to quality and health benefits, particularly in supporting thyroid function and overall metabolic health.

Vitassium by Hacking Salt

Vitassium by Hacking Salt is a highly regarded product for those seeking a reliable source of potassium iodide, particularly beneficial for individuals with dysautonomia. It is notable for its contribution to Dysautonomia International, with 10% of sales from Vitassium going towards the organization. Vitassium is often recommended as a supplement to increase salt intake without the need for table salt, ensuring a balanced iodine level. The product is designed to be easily consumable, making it a practical choice for daily use. As of the available data, Vitassium remains a popular option among those requiring supplemental potassium iodide. For more information, you can discover Vitassium on their official website.

Best Naturals

Best Naturals is a reputable brand known for producing high-quality potassium iodide supplements, manufactured in the USA in accordance with Good Manufacturing Practices (GMP) and FDA-registered facilities. Their products are 3rd party lab tested for purity and quality, ensuring they meet stringent standards. Best Naturals potassium iodide supplements are free from artificial colors, flavors, sweeteners, preservatives, sugar, starch, corn, soy, egg, lactose, gluten, wheat, yeast, and fish, making them suitable for various dietary needs. Each tablet contains 65 mg of potassium iodide, recommended for short-term use only as directed by a healthcare practitioner. The brand's commitment to quality and purity makes it a trusted choice for those seeking reliable potassium iodide supplements. For more information about their potassium iodide supplements, please visit their website.

J.Crow's

J.Crow's is a reputable brand known for producing high-quality Lugol's solution, which contains a mixture of iodine and potassium iodide. Their 5% solution, for instance, consists of 5% (wt/v) iodine and 10% (wt/v) potassium iodide, providing a total iodine content of 126.4 mg/mL, with each drop containing approximately 6.32 mg of iodine. The iodine in J.Crow's Lugol's Solution is derived from mined crystals, ensuring it is free from shellfish and kelp sources. This makes it a reliable choice for those seeking a pure and effective iodine supplement. The solution is available in various potencies, including 1%, 2%, 5%, and 10%, catering to different needs.

Swanson

Swanson is renowned as one of the best producers of potassium iodide supplements, offering high-quality products that meet stringent health standards. For instance, their Pure Encapsulations Iodine supplement provides 225 mcg of iodine per vegetarian capsule, ensuring an essential nutrient intake for thyroid health and overall well-being. Swanson's commitment to quality is evident in their gluten-free, dairy-free, and wheat-free formulations, such as the Source Naturals Potassium Iodide, which offers 32.5 mg per serving. With a focus on customer satisfaction and wellness, Swanson has been a trusted name in the health supplement industry for decades. Their products are available through their global partner, iHerb, ensuring wide accessibility.