10 Best Iodine Supplements (2026) Reviewed
Iodine is an essential trace mineral that your body cannot produce on its own. It plays a critical role in thyroid function, metabolism regulation, and cognitive health. Despite its importance, many people—particularly those who limit salt intake, follow plant-based diets, or avoid seafood—may not get adequate iodine from their diet alone.
The thyroid gland depends on iodine to produce the hormones thyroxine (T4) and triiodothyronine (T3), which regulate everything from metabolic rate to body temperature. Without sufficient iodine, the thyroid cannot function optimally, potentially leading to fatigue, weight changes, and other health concerns.
To compile this guide, we researched dozens of iodine supplements across multiple forms—potassium iodide capsules, kelp-derived tablets, liquid drops, and nascent iodine solutions. We evaluated third-party testing, ingredient quality, brand reputation, and real-world effectiveness to bring you the top 10 options for 2026.
Table of Contents
- Quick Comparison Table
- Best by Form: Capsules vs. Liquid vs. Kelp
- Individual Product Reviews
- Buying Guide
- How to Take Iodine
- Potential Benefits
- Safety Considerations
- FAQ
- Bottom Line
Quick Comparison Table
| Product | Form | Serving Size | Key Differentiator | Best For | Winner |
|---|---|---|---|---|---|
| Pure Encapsulations Iodine | Capsule | 225 mcg | Hypoallergenic, third-party tested | Sensitive individuals | 🏆 TOP PICK |
| Life Extension Sea-Iodine | Capsule | 1,000 mcg | Organic kelp & bladderwrack blend | Higher dosage needs | 🥇 Best Natural Source |
| Thorne Iodine & Tyrosine | Capsule | 225 mcg + 500 mg tyrosine | Added amino acid for thyroid support | Comprehensive thyroid support | 🥇 Best Combination |
| NOW Foods Kelp | Tablet | 150 mcg | Budget-friendly whole food source | Budget buyers | 🥇 Best Budget |
| MaryRuth Organics Iodine Drops | Liquid | 250 mcg (2 drops) | USDA Organic, 450 servings | Liquid preference | 🥇 Best Organic Liquid |
| Carlyle Sea Kelp | Tablet | 225 mcg | 300-day supply, excellent value | Long-term supplementation | 🥇 Best Value |
| Benevolent Nourishment Liquid Iodine | Liquid | 150 mcg (1 drop) | 1,300 servings per bottle | Multi-year supply seekers | |
| Global Healing Detoxadine | Liquid | 1,950 mcg (3 drops) | Organic nascent iodine | Premium nascent form | 🥇 Best Premium |
| Zhou Thyroid Support | Capsule | 150 mcg + cofactors | Full thyroid complex with 14 ingredients | Complete thyroid formula | 🥇 Best Complex |
| Earth Harmony Organic Lugol’s | Liquid | 3,000 mcg | Traditional 2% Lugol’s solution | Higher therapeutic doses |
Best by Form: Capsules vs. Liquid vs. Kelp
Potassium Iodide Capsules
Potassium iodide is the most common and well-researched form of supplemental iodine. Research suggests it offers excellent bioavailability, and it’s the form most commonly used in clinical settings. Capsules provide precise, consistent dosing and are convenient for daily use. They’re ideal for those who want a straightforward, no-fuss supplement.
Best for: Most people seeking reliable iodine supplementation with proven absorption.
Considerations: Some individuals may prefer whole food sources over isolated compounds.
Kelp-Derived Iodine (Tablets/Capsules)
Kelp and other seaweeds naturally accumulate iodine from ocean water, making them a whole food source of this essential mineral. Kelp supplements may also provide trace amounts of other marine minerals. However, ConsumerLab testing has noted that some kelp products contain more iodine than labeled, so choosing a reputable brand with third-party testing is important.
Best for: Those preferring natural, whole food-derived supplements and vegans/vegetarians.
Considerations: Iodine content can vary; some products may contain trace amounts of heavy metals from ocean sourcing.
Liquid Iodine Drops
Liquid iodine supplements offer flexible dosing and may be easier for some individuals to absorb. They’re particularly useful for those who have difficulty swallowing pills or who want to adjust their dosage precisely. Nascent iodine is a specialized liquid form claimed to have enhanced bioavailability, though research comparing it to standard forms is limited.
Best for: Those who dislike pills, need flexible dosing, or prefer sublingual absorption.
Considerations: Taste may be unappealing to some; requires careful measuring for consistent dosing.
Individual Product Reviews
Pure Encapsulations Iodine — Best Overall
Pure Encapsulations delivers pharmaceutical-grade potassium iodide in a hypoallergenic formula that sets the industry standard for purity and quality.
Pure Encapsulations has built its reputation on creating supplements free from common allergens, artificial additives, and unnecessary fillers. Their iodine supplement exemplifies this commitment, providing 225 mcg of potassium iodide per capsule (150% of the daily value) in a clean, simple formulation.
What makes this product stand out is Pure Encapsulations’ rigorous third-party testing protocols. Every batch is verified for purity and potency, giving you confidence that you’re getting exactly what the label states. The company’s manufacturing facilities adhere to strict Good Manufacturing Practices (GMP), and their products are recommended by healthcare practitioners worldwide.
The hypoallergenic formula contains only potassium iodide, plant-based cellulose fiber, and a vegetarian capsule—nothing more. This makes it an excellent choice for individuals with sensitivities or those following elimination diets.
Key Specifications:
- Form: Potassium iodide capsules
- Dosage: 225 mcg per capsule (150% DV)
- Count: 120 capsules
- Certifications: GMP, third-party tested, hypoallergenic
- Dietary: Vegan, gluten-free, non-GMO
Considerations: Premium pricing reflects the quality, though the cost per serving remains reasonable for a 120-day supply.
Life Extension Sea-Iodine — Best Natural Source
Life Extension’s Sea-Iodine provides a potent 1,000 mcg dose from organic kelp and bladderwrack, ideal for those needing higher iodine intake without table salt.
For health-conscious individuals who have reduced their salt intake, Life Extension Sea-Iodine offers a compelling solution. The formula combines organic kelp and bladderwrack extracts with a small amount of potassium iodide to deliver 1,000 mcg of iodine per capsule—over 600% of the daily value.
Life Extension is known for science-backed formulations, and Sea-Iodine is no exception. The company points to research suggesting that athletes, vegans, and those avoiding iodized salt may have suboptimal iodine levels. This higher-dose formula is designed to fill those nutritional gaps effectively.
The use of marine algae provides a more “whole food” approach to iodine supplementation, which some users prefer over isolated potassium iodide. Each batch is tested for purity, and the product is manufactured in the USA following strict quality standards.
Key Specifications:
- Form: Organic kelp/bladderwrack blend + potassium iodide
- Dosage: 1,000 mcg per capsule (667% DV)
- Count: 60 capsules
- Certifications: GMP, non-GMO
- Dietary: Vegetarian, gluten-free
Considerations: The high dose may not be appropriate for everyone; those with thyroid conditions should consult a healthcare provider before use.
Thorne Iodine & Tyrosine — Best Combination Formula
Thorne combines iodine with L-tyrosine, the amino acid precursor to thyroid hormones, for comprehensive thyroid support in one capsule.
Thorne Research understands that the thyroid needs more than just iodine to function optimally. Their Iodine & Tyrosine formula pairs 225 mcg of potassium iodide with 500 mg of L-tyrosine—an amino acid that serves as a building block for thyroid hormones T3 and T4.
This combination approach makes scientific sense: iodine provides the essential mineral component while tyrosine supplies the protein structure of thyroid hormones. Research suggests that adequate tyrosine intake may support healthy thyroid hormone production, making this formula particularly thoughtful.
Thorne is one of the most trusted names in practitioner-grade supplements, with NSF Certified for Sport certification on many products and rigorous in-house testing. Their facilities exceed pharmaceutical standards, and they’ve been a leader in supplement quality for decades.
Key Specifications:
- Form: Potassium iodide + L-tyrosine capsules
- Dosage: 225 mcg iodine + 500 mg L-tyrosine
- Count: 60 capsules
- Certifications: NSF Certified for Sport (company), GMP
- Dietary: Gluten-free, dairy-free
Considerations: Not recommended during pregnancy; those taking MAO inhibitor medications should avoid tyrosine supplementation.
Thorne Iodine & Tyrosine - Mineral and Amino Acid Support for Healthy Thyroid Function - 60 Capsules
NOW Foods Kelp — Best Budget
NOW Foods delivers reliable kelp-sourced iodine at an unbeatable price point, making daily supplementation accessible to everyone.
NOW Foods has been a trusted name in affordable, quality supplements since 1968. Their Kelp tablets provide 150 mcg of iodine (100% daily value) from Laminaria digitata and Ascophyllum nodosum seaweeds, offering a whole food source at a fraction of premium brand prices.
Each bottle contains 200 tablets, providing nearly seven months of daily supplementation. The company maintains GMP certification and conducts third-party testing to verify potency and purity. While NOW Foods occupies the value segment of the market, they don’t compromise on manufacturing standards.
The smaller, coated tablets are designed for easy swallowing, and the vegetarian formula contains no artificial colors, flavors, or preservatives. For those new to iodine supplementation or looking to maintain basic thyroid support without significant expense, NOW Foods Kelp is hard to beat.
Key Specifications:
- Form: Kelp tablets (organic kelp source)
- Dosage: 150 mcg per tablet (100% DV)
- Count: 200 tablets
- Certifications: GMP, NPA A-rated
- Dietary: Vegetarian, non-GMO, kosher
Considerations: Basic formula without additional thyroid-supporting nutrients; kelp content may vary slightly from batch to batch.
MaryRuth Organics Iodine Drops — Best Organic Liquid
MaryRuth’s USDA Organic iodine drops deliver precise dosing in a clean liquid formula, with 450 servings per bottle for exceptional value.
MaryRuth Organics has earned a loyal following for their commitment to clean, organic supplements. Their Iodine Liquid Drops contain just three ingredients: USDA Organic vegetable glycerin, purified water, and potassium iodide—nothing artificial, nothing unnecessary.
Each two-drop serving provides 250 mcg of iodine (167% DV), but the liquid format allows for easy dose adjustment. With 450 servings per one-ounce bottle, this represents over a year’s supply for most users. The mild, slightly sweet taste from the glycerin base makes it easy to take directly or add to beverages.
MaryRuth Organics is Clean Label Project Certified and B Corp Certified, reflecting their commitment to transparency and social responsibility. The product is manufactured in a GMP facility and is particularly popular among vegans and those who prefer liquid supplements.
Key Specifications:
- Form: Liquid drops (potassium iodide)
- Dosage: 250 mcg per 2 drops (167% DV)
- Servings: 450 per bottle
- Certifications: USDA Organic, GMP, Clean Label Project, B Corp
- Dietary: Vegan, gluten-free, soy-free, non-GMO
Considerations: Dosage per serving exceeds 100% DV; individuals should assess their dietary iodine intake before supplementing at full serving size.
Carlyle Sea Kelp — Best Value
Carlyle’s Sea Kelp delivers 300 days of thyroid-supporting iodine at a price that makes long-term supplementation affordable for any budget.
When it comes to pure value per serving, Carlyle Sea Kelp is tough to beat. Each bottle contains 300 tablets, providing nearly a full year of daily supplementation. At 225 mcg per tablet (150% DV), it delivers a meaningful dose from natural kelp sources.
Carlyle has built its reputation on delivering quality supplements at accessible prices. All products are laboratory tested for purity and potency, and their facilities follow GMP guidelines. The formula is free from gluten, wheat, artificial flavors, sweeteners, and preservatives.
For those committed to long-term thyroid health maintenance, Carlyle Sea Kelp offers an economical solution without sacrificing quality. The tablets are reasonably sized and easy to incorporate into any daily supplement routine.
Key Specifications:
- Form: Sea kelp tablets
- Dosage: 225 mcg per tablet (150% DV)
- Count: 300 tablets
- Certifications: Laboratory tested, GMP
- Dietary: Gluten-free, non-GMO
Considerations: Basic formulation focuses solely on iodine delivery; those seeking additional thyroid cofactors should look elsewhere.
Benevolent Nourishment Liquid Iodine — Best for Long-Term Supply
With over 1,300 servings per bottle, Benevolent Nourishment offers possibly the most economical long-term iodine solution on the market.
Benevolent Nourishment has created a liquid iodine supplement that may literally last for years. Each two-ounce bottle contains over 1,300 servings at one drop daily (150 mcg per drop), making it extraordinarily cost-effective for consistent supplementers.
The formula uses potassium iodide in a vegetable glycerin and deionized water base, avoiding alcohol that some liquid supplements contain. The company emphasizes their GMP and Kosher certified facilities, and each batch is tested for quality and consistency.
The sublingual delivery method may offer faster absorption than capsules, and the unflavored formula mixes easily with beverages. For families or individuals seeking a multi-year supply at minimal cost, this product delivers exceptional value.
Key Specifications:
- Form: Liquid drops (potassium iodide)
- Dosage: 150 mcg per drop (100% DV)
- Servings: 1,300+ per 2 oz bottle
- Certifications: GMP, Kosher
- Dietary: Vegan, gluten-free, non-GMO
Considerations: Very long shelf life needed to use entire bottle; dropper may not provide perfectly precise measurements.
Global Healing Detoxadine — Best Premium Nascent Iodine
Global Healing’s Detoxadine represents the pinnacle of nascent iodine supplementation, featuring deep-earth sourced iodine in a highly bioavailable form.
Nascent iodine—also called atomic iodine—is an elemental form with a high electromagnetic charge that proponents claim offers superior absorption. Global Healing’s Detoxadine is the premium option in this category, sourcing iodine from 300-million-year-old salt deposits located over 7,000 feet underground.
Each three-drop serving provides 1,950 mcg of nascent iodine, though individual drops contain 650 mcg each for those preferring lower doses. The USDA Organic certified formula uses only iodine, organic vegetable glycerin, and triple-distilled water—no additives, fillers, or preservatives.
Global Healing manufactures Detoxadine in their cGMP certified facility in Arizona, and the product undergoes third-party testing for purity. While the premium price reflects the specialized sourcing and processing, each bottle contains approximately 200 servings (at full dose).
Key Specifications:
- Form: Nascent iodine liquid drops
- Dosage: 1,950 mcg per 3 drops (1,300% DV)
- Servings: ~200 per bottle
- Certifications: USDA Organic, cGMP, Non-GMO Project Verified
- Dietary: Vegan, gluten-free, alcohol-free
Considerations: High-dose formula requires careful consideration; strong taste may require dilution in water or juice.
Zhou Thyroid Support — Best Complete Thyroid Complex
Zhou’s comprehensive formula combines iodine with 13 other thyroid-supporting ingredients for those seeking an all-in-one approach to thyroid wellness.
Rather than offering iodine alone, Zhou Nutrition takes a holistic approach to thyroid support. Their formula includes 150 mcg of iodine from kelp alongside L-tyrosine, ashwagandha, selenium, zinc, vitamin B12, and eight other carefully selected nutrients—all in a two-capsule daily serving.
This comprehensive approach addresses multiple aspects of thyroid function. Selenium and zinc are essential cofactors for thyroid hormone production, ashwagandha may help support healthy stress response, and B12 plays multiple roles in metabolism. The combination is designed for synergistic support rather than isolated supplementation.
Zhou operates from Salt Lake City with in-house laboratory testing to verify potency, purity, and identity of all ingredients. The vegetarian capsules are free from soy, gluten, and artificial additives.
Key Specifications:
- Form: Multi-ingredient capsules
- Dosage: 150 mcg iodine + 13 additional nutrients per 2 capsules
- Count: 60 capsules (30 servings)
- Key Ingredients: Iodine, L-tyrosine, ashwagandha, selenium, zinc, B12
- Dietary: Vegetarian, gluten-free, soy-free, non-GMO
Considerations: Multiple active ingredients may interact with medications; consult healthcare provider if taking thyroid or blood pressure medications.
Earth Harmony Organic Lugol’s Iodine — Best Lugol’s Solution
Earth Harmony provides traditional Lugol’s solution in organic form, offering both iodine and potassium iodide for those who prefer this time-tested formulation.
Lugol’s solution, invented in 1829, contains both elemental iodine and potassium iodide. Some practitioners believe this combination offers distinct benefits, as the body may utilize each form differently. Earth Harmony’s organic version provides 3,000 mcg per serving in a 2% solution.
The USDA Organic certified formula uses organic vegetable glycerin and triple-distilled water as its base. Each two-ounce bottle provides approximately 395 servings, making it economical despite the premium organic certification.
Earth Harmony emphasizes their commitment to quality and environmental responsibility. The product is manufactured in an Earth-friendly, cGMP facility and undergoes testing for purity and potency.
Key Specifications:
- Form: 2% Lugol’s solution (iodine + potassium iodide)
- Dosage: 3,000 mcg per serving (2,000% DV)
- Servings: ~395 per 2 oz bottle
- Certifications: USDA Organic, cGMP
- Dietary: Vegan, gluten-free, non-GMO
Considerations: Very high dose requires careful titration; traditional Lugol’s taste may be strong; not appropriate for those with iodine sensitivity.
Buying Guide: What to Look for in an Iodine Supplement
Key Quality Indicators
Third-Party Testing: Look for supplements verified by independent laboratories for purity, potency, and contaminant testing. This is especially important for kelp-based products, which ConsumerLab has noted may contain heavy metals or inaccurate iodine levels.
GMP Certification: Good Manufacturing Practices certification indicates the facility follows FDA-recognized quality standards. Look for products made in GMP-certified facilities, ideally in the USA.
Form of Iodine: Potassium iodide is the most studied and reliable form. Kelp-derived iodine offers a whole food approach but may have more variation. Nascent iodine claims enhanced absorption, though research comparing forms is limited.
Certifications That Matter
- USP Verified: Meets United States Pharmacopeia standards for purity and potency
- NSF Certified: Independent verification of label accuracy and contaminant testing
- USDA Organic: Certifies organic ingredients and processing methods
- Non-GMO Project Verified: Third-party verification of non-GMO ingredients
Red Flags to Avoid
- Products making disease treatment claims (violates FDA regulations)
- Extremely high doses without clear labeling or warnings
- No indication of manufacturing standards or testing
- Kelp products without heavy metal testing documentation
- Proprietary blends that hide actual iodine content
Dosage Guidance
The Recommended Daily Allowance (RDA) for iodine is 150 mcg for adults, 220 mcg during pregnancy, and 290 mcg while breastfeeding. The Tolerable Upper Intake Level (UL) is 1,100 mcg daily for adults. Most supplements provide 100-225 mcg, which is appropriate for general maintenance. Higher doses should be taken under healthcare supervision.
How to Take Iodine Supplements
Recommended Dosage
For most adults, 150-225 mcg daily is sufficient to maintain adequate iodine levels. This amount is typically found in one serving of most supplements and represents 100-150% of the daily value. Pregnant and breastfeeding women have higher requirements and should follow their healthcare provider’s recommendations.
Best Time to Take
Iodine supplements are generally well-tolerated with or without food. However, taking iodine with meals may reduce the chance of stomach upset for sensitive individuals. Many people prefer morning dosing, as iodine supports thyroid function and energy metabolism.
Form-Specific Instructions
Capsules/Tablets: Swallow with a full glass of water. Take consistently at the same time each day for best results.
Liquid Drops: May be taken directly under the tongue for faster absorption, or added to water or juice. Use the dropper carefully for accurate dosing.
Nascent Iodine: Often recommended to take on an empty stomach, followed immediately by water. Some products suggest holding under the tongue briefly before swallowing.
Duration and Cycling
Iodine is an essential nutrient required daily, so continuous supplementation is generally appropriate for those who need it. Unlike some supplements, cycling on and off iodine is not typically recommended unless directed by a healthcare provider. Regular thyroid function monitoring may be advisable for those taking higher doses long-term.
Potential Benefits of Iodine Supplementation
Thyroid Function Support
Iodine is essential for the production of thyroid hormones T3 and T4. Research published in the Journal of Nutrition confirms that adequate iodine intake is critical for maintaining healthy thyroid function. The thyroid gland actively concentrates iodine from the bloodstream to produce these hormones, which regulate metabolism throughout the body.
Metabolic Health
By supporting thyroid hormone production, iodine may help maintain healthy metabolic rate. The thyroid acts as the body’s “thermostat,” influencing how efficiently the body converts food into energy. Individuals with suboptimal iodine intake may experience sluggish metabolism as a result.
Cognitive Function
Iodine plays a role in brain health and cognitive function. The NIH Office of Dietary Supplements notes that severe iodine deficiency during fetal development can lead to intellectual disabilities, highlighting iodine’s importance for neurological health. In adults, adequate iodine supports normal cognitive function and may help maintain mental clarity.
Pregnancy and Development
Iodine requirements increase significantly during pregnancy and breastfeeding. The World Health Organization and CDC recommend that pregnant and breastfeeding women take supplements containing iodine. Adequate maternal iodine intake supports fetal brain development and infant growth.
Antioxidant Properties
Some research suggests iodine may have antioxidant properties, helping to neutralize free radicals and reduce oxidative stress. This potential benefit extends beyond thyroid function, though more research is needed to fully understand iodine’s antioxidant role in the body.
Safety Considerations
Potential Side Effects
Most people tolerate iodine well at recommended doses. However, some individuals may experience:
- Metallic taste in the mouth
- Mild stomach upset or nausea
- Headache
- Runny nose or sinus symptoms
High doses may cause more significant effects, including thyroid dysfunction in susceptible individuals.
Who Should Avoid or Use Caution
Thyroid Conditions: Those with Hashimoto’s thyroiditis, Graves’ disease, or other thyroid disorders should consult their healthcare provider before supplementing with iodine. In some cases, additional iodine may worsen autoimmune thyroid conditions.
Medication Interactions: Iodine may interact with antithyroid medications (methimazole, propylthiouracil), lithium, ACE inhibitors, and potassium-sparing diuretics. Discuss iodine supplementation with your healthcare provider if taking these medications.
Iodine Sensitivity: Some individuals are sensitive to iodine and may experience skin reactions, breathing difficulties, or other symptoms. Those with known iodine allergies should avoid supplementation.
When to Consult a Healthcare Provider
- Before starting iodine if you have any thyroid condition
- If you’re taking thyroid medications or other prescription drugs
- During pregnancy or breastfeeding (to determine appropriate dose)
- If you experience any adverse effects after starting supplementation
- If considering doses above the standard daily value
This content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting any supplement regimen, especially if you have existing health conditions or take medications.
Frequently Asked Questions
How do I know if I need an iodine supplement?
Signs of iodine deficiency may include fatigue, unexplained weight gain, feeling cold, dry skin, hair loss, and difficulty concentrating. However, these symptoms can have many causes. A blood or urine test can assess iodine status, and thyroid function tests can reveal if thyroid hormones are affected. Those who limit salt, avoid dairy and seafood, or follow vegan diets are at higher risk of deficiency.
Is iodine from kelp as effective as potassium iodide?
Both forms can effectively provide iodine, though they may differ in absorption rate. Some research suggests potassium iodide may be absorbed more efficiently than kelp-derived iodine. However, kelp provides a whole food source with additional trace minerals. ConsumerLab notes that kelp products may have inconsistent iodine levels, so choosing third-party tested products is important.
Can I take too much iodine?
Yes. The Tolerable Upper Intake Level for adults is 1,100 mcg daily. Excessive iodine intake may cause thyroid dysfunction, either hyperthyroidism or hypothyroidism, depending on the individual. High doses can also cause metallic taste, stomach upset, and other symptoms. Those with autoimmune thyroid conditions may be particularly sensitive to excess iodine.
What’s the difference between nascent iodine and potassium iodide?
Potassium iodide is iodine bound to potassium, which must be separated in the body before use. Nascent iodine is atomic iodine with an electromagnetic charge, claimed to be ready for immediate use by the body. Proponents suggest nascent iodine is more bioavailable, though limited research directly compares the two forms.
Should I take iodine with food?
Iodine supplements can be taken with or without food. Some people find taking iodine with meals reduces the chance of stomach upset. For liquid nascent iodine, some manufacturers recommend taking on an empty stomach for optimal absorption. Consistency in timing is more important than whether it’s taken with food.
How long does it take to see results from iodine supplementation?
If you’re deficient, you may notice improvements in energy and well-being within a few weeks of consistent supplementation. However, significant changes to thyroid function markers typically take 6-12 weeks to become apparent on blood tests. Individual response varies based on the severity of deficiency and overall health status.
Can I get enough iodine from food alone?
Yes, with careful dietary planning. Good food sources include iodized salt, seaweed, fish, dairy products, and eggs. However, iodine content varies significantly based on soil conditions and processing methods. Those who limit these foods or follow restrictive diets may struggle to meet daily requirements through diet alone.
Is iodine safe during pregnancy?
Iodine is not only safe but essential during pregnancy. Requirements increase to 220 mcg daily during pregnancy and 290 mcg while breastfeeding. The CDC and WHO recommend pregnant and breastfeeding women take supplements containing iodine. However, prenatal vitamins vary in iodine content, so check your supplement’s label and discuss with your healthcare provider.
What’s the best form of iodine supplement?
The “best” form depends on individual needs and preferences. Potassium iodide capsules offer reliable, consistent dosing. Liquid drops provide flexible dosing and may be easier to absorb. Kelp supplements offer a whole food approach. Thyroid complexes combine iodine with cofactors for comprehensive support. Most people do well with standard potassium iodide supplements.
Are there any supplements that should not be taken with iodine?
Iodine is generally compatible with most supplements. However, taking multiple iodine-containing products simultaneously can lead to excessive intake. Be aware that multivitamins, thyroid support formulas, and kelp supplements may all contain iodine. Selenium is often recommended alongside iodine for thyroid health, as it supports thyroid hormone metabolism.
Bottom Line Recommendations
For most people: Pure Encapsulations Iodine offers the best combination of quality, purity, and value. Its hypoallergenic formula and rigorous third-party testing make it suitable for nearly everyone needing iodine supplementation.
For budget-conscious buyers: NOW Foods Kelp delivers reliable iodine from a whole food source at an accessible price point. The 200-tablet bottle provides excellent value for basic thyroid support.
For liquid supplement preference: MaryRuth Organics Iodine Drops combines USDA Organic certification, flexible dosing, and exceptional servings per bottle. It’s ideal for those who prefer drops over pills.
For comprehensive thyroid support: Thorne Iodine & Tyrosine or Zhou Thyroid Support provide iodine alongside cofactors that may enhance thyroid function. Choose Thorne for a simpler two-ingredient approach or Zhou for a full-spectrum formula.
For higher dose needs: Life Extension Sea-Iodine provides 1,000 mcg from organic marine algae, suitable for those whose healthcare provider has recommended higher supplementation.
For premium nascent iodine: Global Healing Detoxadine represents the top tier in nascent iodine quality, with USDA Organic certification and deep-earth sourced iodine for those who prefer this specialized form.
