10 Best kelp supplement in Canada

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Last Updated - 2026/04/05

Best Choice

01
NOW

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

9.9 worth the money

8.9 Taste
Main highlights

SUPPORTS HEALTHY THYROID FUNCTION*: Excellent source of iodine, which has been shown to be essential for healthy thyroid function*
GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
FAMILY OWNED & OPERATED: Proudly packaged in Canada by a family owned and operated company.
EASIER TO SWALLOW TABLETS: Kelp has been used for centuries as an important nutritious staple ingredient in Chinese, Japanese, and Korean cuisines
150 mcg OF NATURAL IODINE: Kelp is a large, leafy seaweed belonging to the brown algae family that grows in "forests" in the colder waters of the world's oceans
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9.9

Exceptional

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02
NOW

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

9.9 worth the money

8.9 Taste
Main highlights

SUPPORTS HEALTHY THYROID FUNCTION*: Excellent source of iodine, which has been shown to be essential for healthy thyroid function*
GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
FAMILY OWNED & OPERATED: Proudly packaged in Canada by a family owned and operated company.
EASIER TO SWALLOW TABLETS: Kelp has been used for centuries as an important nutritious staple ingredient in Chinese, Japanese, and Korean cuisines
150 mcg OF NATURAL IODINE: Kelp is a large, leafy seaweed belonging to the brown algae family that grows in "forests" in the colder waters of the world's oceans
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9.8

Exceptional

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03
Jamieson Laboratories

Jamieson Kelp Tablets, Natural Source of 650 mcg Iodine, Thyroid Support, and a Factor in the Maintenance of Good Health. Non-GMO, Gluten-Free, 100 Count, Proudly Canadian

9.5 worth the money

9.1 simple to consume

8.7 Taste
Main highlights

PURELY FORMULATED: Non-GMO, Gluten-Free, Lactose-Free, No Artificial Colours, Flavours, or Preservatives
NATURAL IODINE SOURCE: Supports Thyroid health
EVERYDAY WELLNESS: Each tablet packs 650 mcg Iodine, derived from Ascophyllum nodosum, kelp, a factor in the maintenance of good health
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9.7

Exceptional

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Value for Money

04
Jamieson Laboratories

Jamieson Kelp Tablets, Natural Source of 650 mcg Iodine, Thyroid Support, and a Factor in the Maintenance of Good Health. Non-GMO, Gluten-Free, 100 Count, Proudly Canadian

9.5 worth the money

9.1 simple to consume

8.7 Taste
Main highlights

PURELY FORMULATED: Non-GMO, Gluten-Free, Lactose-Free, No Artificial Colours, Flavours, or Preservatives
NATURAL IODINE SOURCE: Supports Thyroid health
EVERYDAY WELLNESS: Each tablet packs 650 mcg Iodine, derived from Ascophyllum nodosum, kelp, a factor in the maintenance of good health
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9.6

Exceptional

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05
Nature's Way

Nature’s Way Kelp - Iodine Supplement for Thyroid Support from Kelp - Non-GMO - 180 Vegetarian Capsules, Value Size

9.7 worth the money

9.3 Taste
Main highlights

THYROID FUNCTION: Nature’s Way Kelp uses the whole dried kelp plant as a source of iodine. Kelp helps in the function of the thyroid gland.
PREMIUM HERBAL: Nature's Way Kelp provides 300 mcg of iodine per capsule, sourced from 600 mg of Norwegian kelp. Nature’s Way Kelp vegetarian tablets are made from pure, high quality natural ingredients backed by rigorous testing, and are Non-GMO Project Verified.
ENVIRONMENT IN MIND: Our current initiatives keep our manufacturing processes focused on limiting our footprint, and our bottles are made from 97% post-consumer recycled plastic (primarily milk jugs). This initiative reuses over 14 tons of plastic annually.
DIRECTIONS: Adults 19 years and over, take 1 capsule daily.
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9.5

Excellent

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06
Nature's Way

Nature’s Way Kelp - Iodine Supplement for Thyroid Support from Kelp - Non-GMO - 180 Vegetarian Capsules, Value Size

9.7 worth the money

9.3 Taste
Main highlights

THYROID FUNCTION: Nature’s Way Kelp uses the whole dried kelp plant as a source of iodine. Kelp helps in the function of the thyroid gland.
PREMIUM HERBAL: Nature's Way Kelp provides 300 mcg of iodine per capsule, sourced from 600 mg of Norwegian kelp. Nature’s Way Kelp vegetarian tablets are made from pure, high quality natural ingredients backed by rigorous testing, and are Non-GMO Project Verified.
ENVIRONMENT IN MIND: Our current initiatives keep our manufacturing processes focused on limiting our footprint, and our bottles are made from 97% post-consumer recycled plastic (primarily milk jugs). This initiative reuses over 14 tons of plastic annually.
DIRECTIONS: Adults 19 years and over, take 1 capsule daily.
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9.4

Excellent

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07
Natural Factors

Natural Factors Iodine from Kelp, 180 Tablets, 750 mcg of Iodine per Tablet, HIGH POTENCY, Promotes Healthy Thyroid Function, Proudly Canadian
Main highlights

THIRD PARTY TESTING - ISURA VERIFIED CLEAN: The ISURA seal is your assurance that this product is independently verified as clean and safe, and has been tested for up to 800 possible contaminants. This product is ISURA verified clean, one of the highest testing standards in the world.
SUPPORTS THYROID FUNCTION: Natural Factors Iodine from Kelp contains naturally sourced iodine to support healthy thyroid function. Kelp is a sea vegetable and one of the most iodine-rich foods available.
PURE IODINE FROM KELP: The ocean enriches kelp with iodine and other important nutrients, such as potassium, calcium, magnesium, and trace elements, needed for the maintenance of good health. Iodine is an essential mineral that the body relies on for proper thyroid gland function and making thyroid-stimulating hormone.
NON-GMO, GLUTEN FREE, FORUMULATED & PACKAGED IN B.C.
NATURAL PRODUCT NUMBER (NPN): 80016525
COOL WATER KELP: Our kelp is harvested from kelp beds in the cool waters of the North Atlantic Ocean, where the aquatic environment is pure and clean. Each tablet contains 750 mcg of iodine, to be taken once daily. It contains no GMOs, artificial colours, preservatives, or sweeteners, and is suitable for vegetarians and vegans.
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9.1

Excellent

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08
Natural Factors

Natural Factors Iodine from Kelp, 180 Tablets, 750 mcg of Iodine per Tablet, HIGH POTENCY, Promotes Healthy Thyroid Function, Proudly Canadian
Main highlights

THIRD PARTY TESTING - ISURA VERIFIED CLEAN: The ISURA seal is your assurance that this product is independently verified as clean and safe, and has been tested for up to 800 possible contaminants. This product is ISURA verified clean, one of the highest testing standards in the world.
SUPPORTS THYROID FUNCTION: Natural Factors Iodine from Kelp contains naturally sourced iodine to support healthy thyroid function. Kelp is a sea vegetable and one of the most iodine-rich foods available.
PURE IODINE FROM KELP: The ocean enriches kelp with iodine and other important nutrients, such as potassium, calcium, magnesium, and trace elements, needed for the maintenance of good health. Iodine is an essential mineral that the body relies on for proper thyroid gland function and making thyroid-stimulating hormone.
NON-GMO, GLUTEN FREE, FORUMULATED & PACKAGED IN B.C.
NATURAL PRODUCT NUMBER (NPN): 80016525
COOL WATER KELP: Our kelp is harvested from kelp beds in the cool waters of the North Atlantic Ocean, where the aquatic environment is pure and clean. Each tablet contains 750 mcg of iodine, to be taken once daily. It contains no GMOs, artificial colours, preservatives, or sweeteners, and is suitable for vegetarians and vegans.
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8.8

Very Good

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09
Nature's Way

Nature’s Way Kelp – 300 mcg Iodine for Thyroid Function – 600 mg Pure Kelp per Capsule – Vegetarian, Non-GMO – 100 Capsules

9.9 Taste

9.9 worth the money
Main highlights

THYROID FUNCTION SUPPORT: Iodine plays a vital role in maintaining proper thyroid gland function.
SUSTAINABILITY COMMITMENT: As a member of 1% for the Planet, Nature’s Way donates 1% of all our sales to land conservation efforts, ensuring a healthier planet alongside personal wellness – so every bottle supports a healthier planet.
NATURAL IODINE FROM PURE KELP: Each vegetarian capsule provides 290 mcg of iodine from 363 mg pure Norwegian kelp, a natural mineral essential for healthy thyroid function.
DIRECTIONS: Adults, take one capsule daily, preferably with food.
CLEAN, PURE INGREDIENTS: Made with vegetarian-friendly ingredients and Non-GMO Project Verified, our kelp supplement contains no artificial additives or fillers for a clean, natural product.
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8.7

Very Good

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10
Nature's Way

Nature’s Way Kelp – 300 mcg Iodine for Thyroid Function – 600 mg Pure Kelp per Capsule – Vegetarian, Non-GMO – 100 Capsules

9.9 Taste

9.9 worth the money
Main highlights

THYROID FUNCTION SUPPORT: Iodine plays a vital role in maintaining proper thyroid gland function.
SUSTAINABILITY COMMITMENT: As a member of 1% for the Planet, Nature’s Way donates 1% of all our sales to land conservation efforts, ensuring a healthier planet alongside personal wellness – so every bottle supports a healthier planet.
NATURAL IODINE FROM PURE KELP: Each vegetarian capsule provides 290 mcg of iodine from 363 mg pure Norwegian kelp, a natural mineral essential for healthy thyroid function.
DIRECTIONS: Adults, take one capsule daily, preferably with food.
CLEAN, PURE INGREDIENTS: Made with vegetarian-friendly ingredients and Non-GMO Project Verified, our kelp supplement contains no artificial additives or fillers for a clean, natural product.
Show more
8.6

Very Good

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