Best Gluten-Free Iodine Supplements of 2026

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

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Gluten-free iodine supplements are an essential source of iodine for those with gluten sensitivities or celiac disease. Iodine is a vital mineral that supports thyroid health, hormone balance, and cognitive function. These supplements are made without the use of gluten-containing ingredients and are suitable for those following a gluten-free lifestyle. They come in various forms, including capsules, tablets, and drops, and are available in different dosages to meet individual needs. It is important to consult a healthcare professional before taking any new supplement, especially if you have a medical condition or are taking medication.

At a Glance: Our Top Picks

J.CROW'S Lugol's Iodine Solution 2% Cover #TOP 1
J.CROW'S Lugol's Iodine Solution 2%
ftb score rating icon 9.9
MaryRuth's Iodine Liquid Drops Cover #TOP 2
MaryRuth's Iodine Liquid Drops
ftb score rating icon 9.8
Life Extension Sea-Iodine Supplement Cover #TOP 3
Life Extension Sea-Iodine Supplement
ftb score rating icon 9.6

Top 10 Gluten-Free Iodine Supplements

J.CROW'S Lugol's Iodine Solution 2%

J.CrowCo.1231
2 Fl Oz (Pack of 1)
J.CROW'S Lugol's Iodine Solution 2% Cover
J.CROW'S® Lugol's Solution of Iodine 2% 2 oz (1 Bottle) – Premium Iodine & Potassium Iodide Liquid, Gluten &, Alcohol-Free Natural Brine Extract, No Expiration

The J.CROW'S Lugol's Iodine offers a long shelf life and never expires, so you don't have to worry about it losing effectiveness over time. It stays fresh when stored at room temperature, away from sunlight, making it easy to keep on hand. This premium iodine solution comes from ancient natural brine deposits in the Western USA, providing a unique and high-quality source of iodine and potassium iodide. Plus, it's all-natural and pure, free from shellfish, gluten, and alcohol, with no added preservatives or chemicals. The dropper bottle ensures you can measure the right amount easily, making it convenient for daily use or adding to water.

What We Like
Visible results for skin issues
Supports thyroid health
Purer formula, minimal additives
Improved energy and well-being
Multiple usage methods

MaryRuth's Iodine Liquid Drops

0856645008167
1 Fl Oz (Pack of 1)
MaryRuth's Iodine Liquid Drops Cover
MaryRuth Organics Iodine Liquid Drops | Potassium Iodide | 1 Year Supply | 450 Servings | Thyroid 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
Improved energy and metabolism
No taste or odor
Organic and non-GMO
Gluten-free and easy to take

Life Extension Sea-Iodine Supplement

01740
Off White
Life Extension Sea-Iodine Supplement Cover
Life Extension Sea-Iodine™, kelp and bladderwrack-derived Iodine, Supports Healthy Levels of This Essential Nutrient for Thyroid Health and Beyond, Non-GMO, Gluten-Free, Vegetarian, 60 Capsules

Life Extension Sea-Iodine Supplement is a thyroid health-promoting trace element essential for good health. It is a blend of organic marine algae that provides 1000 mcg of iodine without increasing salt intake. A healthy thyroid gland helps regulate metabolism and maintain healthy hormone levels. The product is non-GMO, gluten-free, and made in the USA with the finest raw ingredients. Life Extension Sea-Iodine Supplement is designed to support your healthy lifestyle.

What We Like
Improved energy and well-being
Easy dose adjustment
Supports healthy thyroid function
No adverse reactions for sensitive users

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
Thyroid support
High potency dosage
Long-lasting supply
Easy liquid dosing
Organic and non-GMO

Sea Kelp Iodine | 225mcg | 500 Tablets | by Carlyle

CL1775
Sea Kelp Iodine | 225mcg | 500 Tablets | by Carlyle Cover
Carlyle Sea Kelp Iodine Supplement | 225mcg | 300 Tablets | Non-GMO, Gluten Free | Traditional Herb Supplement

Carlyle Sea Kelp Iodine is a traditional herb supplement that delivers 225mcg of iodine per tablet from green seaweed, providing 150% of your daily value to support your overall wellness. The product is non-GMO, gluten-free, and free from artificial flavor, sweetener, and preservatives. Carlyle, a trusted manufacturer of premium supplements, ensures superior quality and guarantees 100% satisfaction.

What We Like
Natural kelp iodine source
Supports hair and energy
Easy to swallow tablets
Noticeable results within days
Large bottle, good quantity

Thyroid Support Supplement - Energy & Focus Formula

820103169035
Thyroid Support Supplement - Energy & Focus Formula Cover
1 Body Thyroid Support Supplement for Women and Men, Selenium with Iodine, Zinc, B12, Ashwagandha and L-Tyrosine, Supports Hormone Health, Energy and Metabolism, 30 Day Supply

Support healthy thyroid function and promote overall wellness with this non-GMO thyroid support supplement. The formula contains key nutrients such as iodine, vitamin B12 complex, zinc, selenium, ashwagandha, copper, coleus forskohlii and more, which work together to promote cognitive function, natural energy levels and healthy thyroid function. The supplement is manufactured in the USA, vegan-friendly and free from wheat, gluten, soy, milk, egg, fish, or tree nuts.

What We Like
Increased energy and alertness
Reduced hair loss
Improved mood and sleep
Decreased sugar cravings
Support for thyroid health
#TOP 7

Optimox Iodoral 6.25 mg

1505
Optimox Iodoral 6.25 mg Cover
ARG Optimox Iodoral 6.25 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 supplement in tablet form. It provides the same amount of elemental iodine as the average daily intake by mainland Japanese. This supplement supports normal thyroid function, boosts energy levels, promotes a balanced mood, and contributes to overall wellness. With Optimox Iodoral, you can maintain a healthy thyroid, feel more energized throughout the day, improve your mood, and enhance your overall well-being. The tablet form makes it convenient to take, and it is free of common allergens such as wheat, gluten, soy, dairy, and more. Optimox, established in 1978 by Dr. Guy Abraham, brings clinical research and evidence-based nutritional formulas to their products.

What We Like
High potency iodine
Supports thyroid function
Boosts energy levels

LIQUIDHEALTH Nascent Iodine Organic Liquid

2 Fl Oz (Pack of 1)
LIQUIDHEALTH Nascent Iodine Organic Liquid Cover
LIQUIDHEALTH USDA Organic Nascent Iodine Liquid Drops, Pure Iodine Supplement for Thyroid & Immune Support, Energy Supplement - Made in USA, Vegan, Colorless, Tasteless Tincture (2 oz)

LIQUIDHEALTH Iodine Drops are a USDA organic liquid iodine supplement that can enhance your immunity, optimize metabolism, and make you feel energized. This pure iodine supplement supports your thyroid health, encourages hormone balance, and helps regulate hormones and the central nervous system naturally. The easily absorbed liquid drops can improve metabolic performance, stimulate and maximize the immune system, and protect against toxins by binding to them and eliminating them from the body. This gluten-free, soy-free, vegan, dairy-free, and non-GMO iodine supplement also helps you sleep better, raise your energy levels and notice better mental clarity, which can boost your productivity and overall enjoyment of life.

What We Like
Pure USDA organic iodine
Higher absorption liquid drops
Sleep better & raise energy levels
#TOP 9

Carlyle Organic Nascent Iodine Liquid Drops: Optimal and Honest Supplement for Your Wellness

CL18471
2 Fl Oz (Pack of 1)
Carlyle Organic Nascent Iodine Liquid Drops: Optimal and Honest Supplement for Your Wellness Cover
Carlyle Organic Nascent Iodine Liquid Drops | 2 fl oz | Vegan Supplement | Non-GMO, Gluten Free

Carlyle Organic Nascent Iodine Liquid Drops is the perfect supplement for your healthy lifestyle. It contains 325 mcg of Iodine in two liquid drops, which is 217% of your daily value. This optimally absorbed form of Iodine is one of the body's many important trace minerals. Carlyle is rooted in wellness and provides premium, honest supplements. The product is vegan, non-GMO, gluten-free, and organic. Carlyle Manufacturers ensure laboratory-tested, trusted ingredients, superior quality, and 100% guaranteed!

What We Like
Optimally absorbed form of Iodine
Provides 217% of daily value of Iodine in two liquid drops
Rooted in wellness, premium, and honest supplements
Vegan, non-GMO, gluten-free, and organic
Laboratory tested, trusted ingredients, superior quality, and 100% guaranteed
#TOP 10

Nutricost Iodine

NCIODIN
Nutricost Iodine Cover
Nutricost Iodine (Natural Iodine from Organic Sea Kelp) 325mcg, 120 Capsules, Vegetarian, Non-GMO & Gluten Free

Nutricost Iodine is a high-quality iodine supplement made from natural iodine sourced from organic sea kelp. Each capsule contains 325mcg of iodine, providing you with the essential nutrient your body needs. With 120 easy-to-swallow capsules, this supplement ensures convenience and ease of use. It is non-GMO, gluten-free, and suitable for vegetarians, making it a versatile choice for a wide range of dietary needs. Nutricost Iodine is manufactured in a GMP compliant facility, ensuring the highest standards of quality and purity. This supplement is ideal for those looking to support healthy thyroid function, promote energy levels, and maintain overall well-being.

What We Like
High-quality iodine supplement
Convenient and easy-to-swallow capsules
Non-GMO, gluten-free, and vegetarian friendly
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What type of iodine is best for thyroid?

Thorne Iodine and Tyrosine Its iodine supplement is designed to support thyroid health using a combination of 225 mcg of potassium iodide, or 150% of the RDI, and 500 mg of tyrosine — an amino acid your body uses to produce thyroid hormones ( 2 ).

2. Who should not use iodine?

Thyroid disorders: Prolonged use or high doses of iodine might make certain thyroid disorders worse, including hypothyroidism, an enlarged thyroid gland (goiter), or a thyroid tumor. Also, people with autoimmune thyroid disease might be especially sensitive to the harmful effects of iodine.

3. Should you avoid iodine with Hashimoto's?

Should people with thyroid problems avoid these supplements? Iodine: Yes. Avoid it as a supplement whether you have hyperthyroidism or hypothyroidism. The effect of iodine supplements can vary by person, causing the thyroid to produce either too much or too little hormone.

4. Is potassium iodide 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 gluten-free iodine supplement research, we found 24 gluten-free iodine supplement products and shortlisted 10 quality products. We collected and analyzed 310,464 customer reviews through our big data system to write the gluten-free iodine supplements list. We found that most customers choose gluten-free iodine supplements with an average price of $19.24.

The gluten-free iodine supplements are available for purchase. We have researched hundreds of brands and picked the top brands of gluten-free iodine supplements, including J. CROW'S, MaryRuth Organics, Life Extension, Earth Harmony Naturals, Carlyle. The seller of top 1 product has received honest feedback from 1,256 consumers with an average rating of 4.8.

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.