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Kelp Thallus

Nature's Answer
4.8
★ ★ ★ ★ ★
(1155 ratings)
Iodine 150 mcg
Ascophyllum nodosum 250 mg
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Score97

A natural, plant-based kelp capsule that provides a standardized daily dose of iodine.

How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:
Energy

Score 97

A natural, plant-based kelp capsule that provides a standardized daily dose of iodine.

How scoring works
$10.49($0.10 per serving)
iHerb
$ 10.49
Vitacost
$ 10.49
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Analysis

This supplement uses natural kelp thallus to deliver 150 mcg of iodine, which is exactly what most adults need daily. By using the whole plant, it may help provide other minor trace minerals that support how iodine is used. It is a very gentle and natural way to help your metabolism stay on track.

The capsules are vegetarian-friendly and easy to take with any meal. With 100 servings per bottle, it is a great value for someone who wants a clean, plant-based mineral source. It is a very reliable choice for supporting your baseline energy levels.

Pros

  • Natural kelp thallus source
  • Optimal daily 150 mcg dose
  • Plant-based capsules
  • Great value for 100 count
  • Simple, clean ingredients

Cons

  • Slight marine aftertaste
  • Not as cheap as basic tablets
  • Only one size available

Warnings

  • Monitor iodine from other sources
  • Keep in a cool, dry place
  • Talk to a pro if you have thyroid issues

Nutrient quality

95 Highest impact

Whole kelp thallus provides iodine in its natural marine context for effective thyroid support. The dose is accurately calibrated to the daily allowance for most adults.

Ingredient transparency

99 Highest impact

The label clearly distinguishes between the total kelp weight and the elemental iodine concentration. Total absence of proprietary blends ensures full ingredient clarity for the user.

Customer satisfaction

95 Highest impact

High ratings from over 1,000 users indicate significant trust and reliability for thyroid support. Reviews reflect that the product is effective and well-received within its metabolic category.

Value for money

99 Highest impact

Offering a 100-day supply for around ten dollars represents exceptional affordability. The quality of whole kelp thallus justifies the price and provides great value in the iodine market.

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Goals

Energy
Impact
Highest effect
B+ Goal FitB+ Strength of SupportC- CoverageA+ Formula Quality

This natural source of iodine focuses on thyroid function to regulate the body's basal metabolic rate. Utilizing kelp provides a foundational approach to preventing energy depletion caused by mineral deficiency.

Iodine is essential for the production of thyroid hormones that govern cellular energy expenditure. This formulation delivers 150mcg, which appears well aligned with the daily requirement for maintaining metabolic vitality.

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Ingredients

IngredientAmount per serving
Iodine (Kelp)
 150 mcg
Kelp
250 mg
Adults 18–50
Report overview
Iodine (Kelp) · 150 mcg OverallScore86
C+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
This Swanson kelp supplement provides a standard dose of iodine from whole-food marine sources. It is an affordable choice for those who prefer plant-based minerals in an easy-to-swallow capsule.
View ingredientView products
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Organic Kelp

NOW
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Liquid Kelp

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Natural Icelandic kelp tablets provide a standardized dose of iodine to support thyroid function and energy maintenance. The high tablet count per bottle makes it an exceptionally cost-effective option for whole-food mineral support.
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98 Value

Organic Kelp

NOW
4.7
★★★★★
(1881 ratings)
This organic liquid kelp offers an incredible value with its massive serving count and clean marine-sourced iodine. It is an ideal option for individuals looking for high-purity thyroid support with a minimal cost per day.
Other sellers (3)
97 Value

Kelp Whole Thallus 600 mg

Nature's Way
4.8
★★★★★
(18819 ratings)
Providing 270 mcg of iodine from whole kelp thallus, this supplement offers more robust daily support for thyroid function. The large container size provides excellent value for those seeking natural metabolic precursors in capsule form.
Other sellers (3)
97 Value

Kelp

Swanson
4.7
★★★★★
(2673 ratings)
Atlantic kelp tablets offer a simple, natural source of iodine to support thyroid health and energy levels at a very low price. This bulk bottle provides 250 servings of whole-food minerals for consistent metabolic maintenance.
Other sellers (1)
96 Performance

Kelp

Oregon's Wild Harvest
4.7
★★★★★
(2880 ratings)
Using certified organic kelp in capsule form ensures high purity and consistent mineral levels for thyroid health. This whole-food source provides the iodine within its natural plant matrix for steady absorption and metabolic support.
Other sellers (3)
97 Performance

Kelp

NOW
4.8
★★★★★
(10115 ratings)
This organic kelp capsule provides a higher 325 mcg dose for more robust support of the thyroid and metabolic rate. The organic certification ensures a high standard of purity for marine-sourced ingredients for daily energy.
Other sellers (4)
97 Performance

Iodine+

Codeage
4.7
★★★★★
(937 ratings)
Nascent iodine provides superior bioavailability and stability, helping the body efficiently synthesize thyroid hormones. This liquid form is quickly absorbed and avoids the use of digestive binders found in traditional capsules.
Other sellers (4)
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