Sea Kelp Cubes

Sea Kelp Cubes

8 cubes per 4.8 oz pack | Product #FBKC201

Atlantic Sea Farms™ Kelp Cubes add a nutritional boost to smoothies, pesto, soups, pasta, and more. While most of the edible seaweed on the market is grown in Asia — and sometimes dried, rehydrated, and dyed — we are pleased to offer natural, unadulterated kelp that is cultivated in the clean, cold waters of Maine.

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Number of Packs
Sea Kelp Cubes 8 cubes per 4.8 oz pack
$ 17.00 New in stock
Sea Kelp Cubes 8 cubes per 4.8 oz pack
$ 49.00 New in stock
Sea Kelp Cubes 8 cubes per 4.8 oz pack
$ 89.00 New in stock
Sea Kelp Cubes 8 cubes per 4.8 oz pack
$ 119.00 New in stock

NOTE: Frozen products must total at least $65 to ensure quality upon delivery. 


  • Blanched, pureed kelp
  • 8 triangular cubes per 4.8 oz pack
  • Easy to use one cube at a time
  • No additives, preservatives, or dyes
  • Gluten-free, non-GMO
  • Cultivated on the coast of Maine
  • Keep frozen until use
  • Product of USA

Nutrients in kelp: Rich in iodine

Sea kelp ranks as one of the best food sources of iodine.

Each 0.6-ounce serving averages 105% of the U.S. Daily Value (158mcg) for iodine.

Iodine is critical to thyroid and hormone function, although deficiency is uncommon. One exception is women of reproductive age, who –according to the American Academy of Pediatrics – are often marginally iodine deficient.

On average, kelp is a significant source of vitamin K (8% of the U.S. Daily Value) and folate (5% of the U.S. Daily Value), and averages 1-3% (or less) of the U.S. Daily Value for potassium, calcium, and magnesium.

Kelp gets its green color from chlorophyll, and is a rare source of the carotenoid-class pigment called fucoxanthin, which may promote fat-burning within white adipose tissue .

Finally, kelp contains substantial amounts of sodium alginate, which removes radioactive substances such as iodine-131 and strontium-90 from the body.

Eco and family benefits

Vital Choice kelp is grown naturally off the coast of Maine, without fertilizers or pesticides.

Kelp can grow up to half a meter a day, ultimately reaching heights of 90 to 240 feet (30 to 80 meters).

By removing nitrogen, phosphorus and carbon dioxide from the ocean, growing kelp helps to reduce the damaging acidification caused by carbon emissions.

In addition to helping preserve the ocean environment, the open-ocean farm that supplies our kelp aids families that depend on the sea.

Kelp is harvested during the winter, and the farm employs lobster and scallop harvesters during their off-season, providing much-needed income.


  • Council on Environmental Health, Rogan WJ, Paulson JA, et al. Iodine deficiency, pollutant chemicals, and the thyroid: new information on an old problem. Pediatrics. 2014 Jun;133(6):1163-6. doi: 10.1542/peds.2014-0900. Review.
  • Lee SM, Lewis J, Buss DH, Holcombe GD, Lawrance PR Iodine in British foods and diets. Br J Nutr. 1994 Sep;72(3):435-46.
  • Teas J, Pino S, Critchley A, Braverman LE. Variability of iodine content in common commercially available edible seaweeds. Thyroid. 2004 Oct;14(10):836-41.
  • USDA. National Nutrient Database for Standard Reference Release 27. Full Report (All Nutrients): 11445, Seaweed, kelp, raw.
  • U.S. Office of Dietary Supplements. Iodine Fact Sheet for Health Professionals. Accessed at

Sea Kelp (Saccharina latissima)


Kelp is a marine vegetable & may contain trace amounts of shellfish

Nutrition Facts
Kelp Cubes
Serving Size 1 cube, 0.6 oz
Number of servings: 8

Amount Per Serving
Calories 2 Calories from Fat 1

% Daily Value*
Total Fat 0g 0
Saturated Fat 0g 0
Trans Fat 0g 0
Cholesterol 0mg 0
Sodium 10mg 0
Total Carbohydrate 0g 0
Dietary Fiber 0g 0
Sugars 0g 0
Protein 0g 0

Vitamin A 0% • Calcium 2%

Iodine 105% • Zinc 3%

Vitamin C 0% • Iron 0%

Magnesium 1%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

Add one cube to a blueberry smoothie, minestrone soup, or tomato sauce.

A basil/kelp pesto makes a great condiment on wild cod, halibut, salmon, sablefish, tuna, scallops, or shrimp

Keep frozen.

Frozen kelp cubes will last 2 years, and will last 5 days after being thawed.

Serving suggestions

Add our fresh, mild tasting cubes to smoothies, soups, and sauces.

Simply break one cube (or more) off the block, and add it to your food or beverage.

Try adding one cube to a blueberry smoothie, minestrone soup, miso soup, or tomato sauce.

A basil/kelp pesto makes a great condiment on wild cod, halibut, salmon, sablefish, tuna, scallops, or shrimp.

Frozen foods are packed with dry ice
and ship Monday through Wednesday (except holidays).

Frozen foods ship via 2nd Day Air service or 1-3 Day Express Ground service, depending on shipping date and destination.

Free shipping
on orders over $99

Standard Shipping Fees
  • Up to $49.99 = $6.95 shipping
  • $50 - $98.99 = $12.95 shipping
  • $99 and over = FREE shipping
Overnight shipping and other premium services cost extra; for more information, see our Shipping page. (Live shellfish ship overnight at no extra cost.)
  • We cannot ship perishable goods to PO boxes.
  • Free standard shipping applies to all orders of $99 or more sent to any U.S. street address.
  • Perishable shipments to Alaska and Hawaii are subject to surcharges; please see our Shipping page.
When will my frozen foods arrive?
  • Orders placed Saturday, Sunday, Monday, or before 10 AM Tuesday will ship on Tuesday* to arrive 1-3 days later.
  • Orders placed between 10 AM Tuesday and 10 AM Wednesday will ship on Wednesday* to arrive 1-2 days later.
  • Orders placed after 10 AM on Wednesday through 12:00 midnight Friday will ship on Monday* to arrive 1-3 days later.
*Except when a holiday falls on the designated shipping day.

For more information, see our Shipping page.