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Kelp Products

10 Best Kelp Supplements Hand-Picked

There are different varieties of kelp. It is commonly seen in many Asian food recipes. Kelp is sometimes referred to as kombu, konbu, or wakame.

What is Kelp?

Kelp (Ascophyllum nodosum) is a type of edible seaweed. It’s brown in color and grows in shallow nutrient-rich saltwater all over the world. It has been used medicinally for hundreds of years. There are different varieties of kelp. It is commonly seen in many Asian food recipes. Kelp is sometimes referred to as kombu, konbu, or wakame.

Kelp is extremely rich in various essential vitamins and minerals, including vitamins A, B1, B2, C, D, and E. All seaweeds contain a high and healthy dose of iodine — the NIH says that seaweed is one of the best natural food sources for this important mineral. Many people take kelp for this purpose. Kelp also contains zinc, magnesium, iron, potassium, copper and calcium. It has ten times the amount of calcium found in milk.

Due to its high nutritional content, kelp benefits the body in a number of ways. It is also high in antioxidants which help fight free radicals. It may help boost immune function and detoxify the body. These are just a few of its myriad of health benefits.

Studies investigating the health benefits of kelp are still in process, but it’s undoubtedly a powerful food.

How to Take Kelp

It’s possible to eat kelp raw or cooked in foods, though it is different than the seaweed that is commonly found in stores and at sushi restaurants. A more convenient way of consuming kelp is by taking supplements, which are available as tablets, capsules, or in powdered form. A capsule or tablet is particularly easy to take on-the-go and without worrying about the taste.

Be careful when taking kelp supplements. It contains very high concentrations of certain minerals, so it can be dangerous when taken in excess or when used incorrectly.

For example, do not combine kelp with blood thinning medications without speaking to a doctor, as it may affect the effectiveness of the medication. Too much iodine can also be detrimental to the thyroid and may imbalance hormones.

Things to Look For in a Good Kelp Supplement

It’s best to buy kelp that was harvested from healthy, clean waters, since kelp readily absorbs toxins and heavy metals from its surrounding environment.

It’s worth buying organic kelp supplements when possible, or looking for packages that mention that the product has been tested for arsenic. Kelp supplements that specify the area of the source of the kelp are also a good idea.

It’s also important to buy a kelp supplement that contains clear information about the amount of the product that’s in dried or capsule form, since it’s important that dosing is done accurately. Doses of kelp in supplements can vary a great deal, so pay attention to the numbers on the label and do your research.

Top 10 Kelp Supplements


1. Nature’s Way Kelp

Nature’s Way kelp supplement comes in the form of 180 vegetarian capsules, which contain 100% pure kelp. Each capsule has 600mg of kelp, which has 200% of your daily value of iodine.

Nature’s Way’s supplements are made without artificial ingredients, preservatives, or other allergens like gluten or soy. These capsules are also made without animal products.

Specs and Highlights:

  • 600mg of kelp
  • 180 capsules
  • Vegetarian
  • Non-GMO

2. NOW Foods Kelp

NOW Foods makes a kelp supplement with less kelp per serving. It contains 100mg per tablet and there are 200 tablets total. There is 100% of your daily value of iodine in each tablet. NOW Foods recommends that you take just one tablet daily per meal.

This supplement is suitable for those who do not intend to take a high dose of kelp per day. This supplement is high-quality, so you don’t have to worry about kelp that comes from polluted waters.

Specs and Highlights:

  • 100mg of kelp
  • 325mcg of iodine
  • 200 tablets
  • Vegetarian
  • Non-GMO

3. Country Life Norwegian Kelp

This kelp supplement contains 225mcg of iodine in each serving, which is 150% of your daily value. There are 300 tablets in each bottle, which makes this a great deal.

These tablets are vegetarian as well as hypoallergenic. Country Life is a dependable, family-owned business. This kelp is sourced from Norwegian waters, and is manufactured sustainably. Take one tablet daily with food.

Specs and Highlights:

  • 225mcg of kelp
  • 300 tablets
  • Vegetarian
  • Sourced from Norway

4. Solgar North Atlantic Kelp

Solgar’s kelp supplement is safely sourced from the North Atlantic. They contain 200mcg of iodine per serving from kelp, or 130% of your daily value.

Each tablet is free of artificial flavor, preservatives or color. This supplement is also vegetarian, and free of harmful fillers or preservatives. Take one tablet per day unless otherwise instructed.

Specs and Highlights:

  • 200mcg of iodine/kelp
  • 250 tablets
  • Vegan
  • Sugar and starch-free
  • Sourced from the North Atlantic

5. Swanson Kelp

Swanson’s supplements have a similarly low dose of kelp per serving, at 59mg per tablet, but they have 150% of the recommended dose of iodine.

This premium brand offers high-quality supplements and their kelp tablets are no exception. There are 250 tablets per bottle, and this brand is particularly affordable. Swanson’s kelp is sourced from the Atlantic.

Specs and Highlights:

  • 59mg of kelp
  • 225 mcg of iodine
  • 250 tablets
  • Sourced from the Atlantic

6. Oregon’s Wild Harvest Kelp

This smaller company’s supplement is organic, so it’s even better for your health. There are only 90 caplets in each bottle, so it is a little pricier.

However, there is plenty of kelp in each capsule — 600mg per capsule. There’s 400mcg of iodine per capsule, which is on the higher side. These capsules are also vegetarian and was grown and harvested sustainably.

Specs and Highlights:

  • 600mg of kelp
  • 400mcg of iodine
  • Certified organic
  • Sustainably harvested
  • Tested for heavy metals

7. Nature’s Life Kelp Tablets

Nature’s Life kelp supplements are sourced from Icelandic seas. There’s just 41mg of kelp in each tablet, but you can buy a bottle with a whopping 1000 tablets at a time and each tablet has 225mcg of iodine, which is 150% your daily value.

This is a great option for testing the effects of kelp on your body and gradually increasing if necessary or recommended by a doctor. This kelp is also naturally grown and harvested, without chemicals or pesticides.

Specs and Highlights:

  • 41mg of kelp
  • 1000 tablets
  • 225mcg of iodine
  • Sourced from Iceland
  • Naturally grown without chemicals
  • Vegetarian

8. Puritan’s Pride Sea Kelp

Puritan’s Pride offers a standard kelp supplement. It contains just 100% of your daily value of iodine at 150mcg — so it’s perhaps a good introduction to taking excess iodine outside of your regular diet. This supplement is vegetarian, and there are 250 tablets in each bottle. This supplement is affordable and made with high quality ingredients.

Specs and Highlights:

  • 150mcg of iodine
  • 250 tablets
  • Vegetarian

9. Solaray Kelp with Folic Acid

Solaray’s kelp supplement is formulated with folic acid included in each capsule as well, which complements and enhances the beneficial effects of kelp. There is 550mg of kelp in each capsule, and 400mcg of folic acid per capsule, which is 100% of the recommended daily value.

These supplements contain 100% wild-harvested real kelp. This supplement is great for those who are looking to use kelp to support thyroid function.

Specs and Highlights:

  • 550mg of kelp
  • 400mcg of folic acid
  • 100 capsules
  • Wild-harvested

10. Nature’s Plus Kelp

Nature’s Plus kelp supplements are harvested in Nova Scotia and the Pacific Ocean. There is 300mg of kelp in each tablet, which contains 150mcg of iodine, or 100% of the daily value.

This is a wonderful natural source of kelp. There are 300 tablets in each bottle and it’s an affordable, high-quality kelp supplement.

Specs and Highlights:

  • 300mg of kelp
  • 150mcg of iodine
  • 300 tablets
  • Sourced from Nova Scotia and the Pacific