August 18, 2025

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10 Best sea kelp iodine supplements of 2025

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Best Choice

1

Dr. Berg Nutritionals
Dr. Berg Sea Kelp Enhanced Iodine - 200 mcg of Premium Iodine - Seaweed Blend Includes Klamath Blue-Green Algae & Sea Kelp - 90 Capsules
Main highlights

Natural_Iodine_Source
Derived from Icelandic Kelp and Blue-Green Algae for thyroid support.

Ideal_for_Health_Enthusiasts
Perfect for those seeking natural immune and metabolism support.

Easy_to_Swallow
Customers appreciate the capsules' ease of swallowing and no aftertaste.
Key specs
- Form:Capsules
- Source:Icelandic Kelp
- Iodine Content:Natural source
- Organic:N/A
- Serving Size:N/A
9.7

Exceptional

Our Rating
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Value for Money

2

NusaPure
NusaPure High Absorption Sea Kelp Iodine 325mcg 650 mg per Veggie Capsule 200 Count (Non-GMO, Vegan)

19% Off
Main highlights

Key Features and Benefits
High potency 325 mcg natural iodine per capsule from 10:1 extract, vegan/vegetarian, non-GMO, gluten-free, with Bioperine for enhanced absorption.

Ideal Use Cases
Perfect for individuals seeking thyroid support, metabolism boost, and overall wellness from a natural source in a convenient daily capsule.

Customer Reviews Highlight
Most praised for significantly improving energy levels and thyroid function, with noticeable benefits in overall health and well-being.
9.5

Excellent

Our Rating

9.7
simple to consume

9.5
worth the money

9.3
Flavor
3

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

14% Off
Main highlights

Powerful Iodine Source
Delivers 225 mcg of iodine from sea kelp, supporting thyroid health.

Versatile Health Supplement
Ideal for anyone seeking to boost iodine intake naturally.

Great Value and Quality
Praised for cost-effectiveness and ease of use by customers.
Key specs
- Form:Tablet
- Source:Kelp
- Iodine Content:225 mcg
- Organic:N/A
- Serving Size:1 tablet
9.3

Excellent

Our Rating

9.7
simple to consume

9.3
Flavor

9.3
worth the money
4

Life Extension
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

25% Off
Main highlights

Supports Thyroid Health
Life Extension Sea-Iodine aids thyroid function, metabolism, and energy by supporting T3 and T4 hormone production.

Ideal for Iodine Deficiency
Perfect for individuals avoiding salt or seeking non-synthetic iodine sources.

Praised for Energy Boost
Customers frequently commend its ability to enhance energy and mental clarity.
9.1

Excellent

Our Rating

9.7
simple to consume

9.3
worth the money

9.1
Flavor
5

Triquetra Health
Organic Iodine Supplement from Sea Vegetable Complex, Whole Food & Raw Form - Iodine Plus Trace Mineral Complex – Contains Purest Icelandic Sea Kelp, Irish Moss & Bladderwrack (250 mcg)
Main highlights

Organic Iodine Supplement
100% organic iodine from whole food and raw form.

Ideal for Thyroid Support
Helps regulate thyroid function and hormone balance.

Natural Source Praised
Customers appreciate the natural seaweed-derived iodine source.
Key specs
- Form:Whole food and raw
- Source:Icelandic seaweed
- Iodine Content:100% organic iodine
- Organic:Yes
- Serving Size:N/A
8.8

Very Good

Our Rating

9.9
worth the money

9.3
simple to consume

9.3
Absorbency
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6

NOW Foods
NOW Supplements, Kelp 325 mcg of Natural Iodine, Supports Healthy Thyroid Function*, Super Green, 250 Veg Capsules

44% Off
Main highlights

Natural Iodine Source for Thyroid Health
NOW Kelp provides 325 mcg of natural iodine to support thyroid function.

Ideal for Individuals with Low Iodine Intake
Best for those lacking iodine due to diet or lifestyle.

Improved Energy and Mental Clarity
Customers report increased energy and clearer thinking after use.
8.7

Very Good

Our Rating

9.5
simple to consume

9.3
worth the money

9.1
Flavor
7

NOW Foods
NOW Foods Supplements, Kelp 150 mcg of Natural Iodine, Easier to Swallow Tablet, Super Green, 200 Tablets

46% Off
Main highlights

Key Features
150 mcg of natural iodine from kelp supports healthy thyroid function. GMP Quality Assured and packaged in the USA.

Ideal Use Cases
Perfect for those seeking a natural thyroid health boost and an essential staple for fans of Chinese, Japanese, and Korean cuisines.

Customer Praise
Most reviews highlight the ease of swallowing these tablets and the noticeable improvement in thyroid function and overall energy levels.
8.6

Very Good

Our Rating

9.1
simple to consume

9.1
Flavor

8.7
worth the money
8

Nature's Way
Nature's Way Kelp, Supports Thyroid Function*, 600 mg per Serving, Non-GMO Project Verified, 180 Capsules (Packaging May Vary)
Main highlights

Key Features and Benefits
Delivers 270 mcg of iodine for thyroid support, vegan, meets Non-GMO Project standards, gluten-free, no artificial additives.

Ideal Use Cases
Perfect for adults seeking to support thyroid function naturally, especially those following a vegan or strict dietary restrictions.

Customer Reviews Summary
Highly praised for improving energy levels and thyroid health, with noticeable benefits from consistent daily use.
8.4

Good

Our Rating

9.7
simple to consume

9.5
worth the money

8.9
Flavor
9

Life Extension
Life Extension Sea-Iodine Capsules, 1000 mcg, 150 Veg Caps, Natural Iodine Supplement from Kelp and Bladderwack
Main highlights

Enhanced Iodine Supplement
Contains 1,000 mcg iodine from Kelp and Bladderwack extracts.

Ideal for Thyroid Support
Perfect for individuals seeking natural thyroid health enhancement.

Small Capsule Convenience
Customers love the easy-to-swallow small capsules.
8.2

Good

Our Rating
10

Oregon's Wild Harvest
Oregon's Wild Harvest Kelp Organic Supplement | Natural Source of Iodine | Vegan Capsules, 90 Count

15% Off
Main highlights

Key Features and Benefits
Organic kelp from clean Atlantic waters, freshly milled for potency. Non-GMO verified, no artificial additives. Made with love in the USA.

Ideal Use Cases
Perfect for individuals seeking a natural, potent supplement to enhance their daily health regimen, especially those prioritizing organic, sustainably sourced ingredients.

Customer Reviews Highlight
Most praised for its noticeable health benefits and the high quality of the product, confirming its potency and organic purity.
Key specs
- Form:Organic Kelp
- Source:Atlantic Ocean
- Iodine Content:N/A
- Organic:Yes
- Serving Size:N/A
8.1

Good

Our Rating

9.7
simple to consume

9.5
worth the money

9.1
Flavor

10 Best sea kelp iodine supplements of 2025

1

Dr. Berg Sea Kelp Enhanced Iodine - 200 mcg of Premium Iodine - Seaweed Blend Includes Klamath Blue-Green Algae & Sea Kelp - 90 Capsules

How do we rank?

How do we rank?

Analyzing top stores

2

NusaPure High Absorption Sea Kelp Iodine 325mcg 650 mg per Veggie Capsule 200 Count (Non-GMO, Vegan)

9.7

9.5

9.3

3

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

9.7

9.3

9.3

4

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

9.7

9.3

9.1

5

Organic Iodine Supplement from Sea Vegetable Complex, Whole Food & Raw Form - Iodine Plus Trace Mineral Complex – Contains Purest Icelandic Sea Kelp, Irish Moss & Bladderwrack (250 mcg)

9.9

9.3

9.3

6

NOW Supplements, Kelp 325 mcg of Natural Iodine, Supports Healthy Thyroid Function*, Super Green, 250 Veg Capsules

9.5

9.3

9.1

7

NOW Foods Supplements, Kelp 150 mcg of Natural Iodine, Easier to Swallow Tablet, Super Green, 200 Tablets

9.1

9.1

8.7

8

Nature's Way Kelp, Supports Thyroid Function*, 600 mg per Serving, Non-GMO Project Verified, 180 Capsules (Packaging May Vary)

9.7

9.5

8.9

9

Life Extension Sea-Iodine Capsules, 1000 mcg, 150 Veg Caps, Natural Iodine Supplement from Kelp and Bladderwack

10

Oregon's Wild Harvest Kelp Organic Supplement | Natural Source of Iodine | Vegan Capsules, 90 Count

9.7

9.5

9.1

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