Kelp

Kelp

Oregon's Wild Harvest4.7 (2,937 ratings)
Format:Capsule Quantity: 90 Capsule(s) · 90 servings
Goals
$18.36 $0.20 per serving
iHerbLowest$18.36Vitacost$18.36Pure Formulas$18.36Amazon$18.36

About this product

The capsule identifies 600 mg of organic kelp and a 400 mcg iodine yield. Separating the source weight from elemental iodine makes the serving easier to assess.

Four hundred micrograms is well above basic maintenance needs, and natural kelp can still vary in composition. The supplied data does not describe contaminant screening or batch standardization.

Adults who deliberately want kelp-derived iodine at a higher amount may value the disclosure. Routine users or those eating seaweed regularly should consider a lower dose.

Who is it for
  • Adults who prefer organic kelp
  • People following a defined higher-iodine plan
  • Users who value source-weight disclosure
Best for
  • Kelp-based iodine supplementation
  • Clearly quantified marine iodine
  • Focused higher-dose use

Pros

  • Discloses both kelp weight and iodine yield
  • Uses an organic kelp source
  • Simple single-capsule format

Cons

  • Dose exceeds maintenance needs
  • Standardization details are absent
  • No supporting nutrients are included

Warnings

  • The 400 mcg iodine serving may disturb thyroid function in people with autoimmune thyroid disease, nodules, or other thyroid conditions.
  • Seaweed foods and other iodine supplements can substantially increase total exposure when combined with this capsule.
  • The supplied data does not confirm contaminant screening for the marine-source ingredient.

Product analysis

79 out of 100
Strong source and yield disclosure help, but 400 mcg of kelp-derived iodine is high for routine maintenance.

AI assessment of the formula, label and price. How scoring works

Nutrient quality75

Organic kelp provides a traceable whole-food source with a clearly stated iodine yield. The iodine amount is well above routine maintenance needs, while the higher intake may disrupt thyroid function in people with thyroid disease or iodine sensitivity.

Ingredient transparency80

Both iodine yield and organic kelp source weight are disclosed clearly. Serving totals are apparent, but full directions and inactive ingredients are not supplied.

Customer satisfaction71

The supplied average rating is strong. The very large rating base makes the average unusually stable, while complaint and firsthand experience details are unavailable.

Value for money90

Formula quality supports the asking position well. The serving value is highly competitive within the category.

Format
Capsule
Container
90 Capsule(s)
Per serving
$0.20
Customer rating
4.7 · 2,937 ratings
Report analysis

Goals

Energy
Energy
Impact
Lower effect
A- Ingredient FitF PathwaysF EvidenceA+ Formulation Logic
Iodine · 400 mcg
Study evidence
Iodine Adverse 3 studies

Ingredients

IngredientAmount per servingScore
Iodine (Kelp)
 400 mcg 78
organic Kelp
600 mg
Gluten Free Adults 18–50 Dairy Free Women Organic
Report overview
Iodine (Kelp) · 400 mcg OverallScore78
C Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyA+ Value
Kelp clearly discloses 400 mcg of iodine per serving, but its chemical form remains unknown. 400 mcg per serving exceeds the stated range for basic daily iodine maintenance. Its seaweed source has a favorable sourcing claim, without independent confirmation of purity. The cost per serving is low.
How this ingredient is rated

Active Ingredient Quality & Bioavailability61

The available information does not identify the chemical form of iodine. The seaweed source carries an organic or geographic sourcing claim, which does not independently establish contaminant absence.
Iodine Form & Bioavailability
The available information does not identify the chemical form of iodine.
Marine Source Purity & Sourcing
The seaweed source carries an organic or geographic sourcing claim, which does not independently establish contaminant absence.

Dose, Safety & Label Transparency85

The iodine amount is clearly disclosed. 400 mcg per serving exceeds the stated range for basic daily iodine maintenance and remains below the stated adult upper intake limit.
Dosage Efficacy for Daily Support
400 mcg per serving exceeds the stated range for basic daily iodine maintenance.
Dosage Safety & Upper Limits
The 400 mcg serving remains below the stated adult upper intake limit of 1,100 mcg.
Elemental Iodine Transparency
The iodine amount itself is clearly stated at 400 mcg, rather than only the weight of its source.

Value100

The cost per serving is low.
Price Per Effective Serving
The cost per serving is low.
View ingredientView products
Loading alternative details
88 Performance

Arctic-Kelp 225 mcg

Country Life

The ingredient profile provides 225 mcg of iodine from Arctic kelp; compared with the original, the 225 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The appropriate dose and very low serving cost create excellent practical value.

86 Performance

Kelp

NOW

The ingredient profile provides 325 mcg of iodine from organic kelp; compared with the original, the 325 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. Organic kelp provides a useful whole-food iodine source, but its amount is higher than basic daily maintenance needs.

87 Performance

Kelp

Swanson

The ingredient profile provides 225 mcg of iodine from Atlantic kelp; compared with the original, the 225 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The appropriate dose and very low serving cost create excellent practical value.

83 Budget

Organic Kelp

NOW

The lower serving cost provides 450 mcg of iodine from organic kelp; compared with the original, the iodine amount stays close to the original at 450 mcg and the seaweed-based approach is retained. Organic kelp offers a useful purity signal and flexible liquid use, but the iodine amount is above basic maintenance needs.

79 Budget

Iodine 325 mcg

Nutricost

The lower serving cost provides 325 mcg of iodine from kelp; compared with the original, the 325 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The amount exceeds basic maintenance, while missing harvest and purity details reduce confidence for routine use.

81 Budget

Icelandic Kelp

Nature's Life

The lower serving cost provides 225 mcg of iodine from Icelandic kelp; compared with the original, the 225 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The iodine amount is above basic daily needs and can complicate thyroid disease or thyroid medication, so routine use should be deliberate.

88 Value

Kelp

NOW

The favorable balance of serving cost and formulation provides 150 mcg of iodine from organic kelp; compared with the original, the 150 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. Organic kelp supplies a standard maintenance amount with useful sourcing detail, though natural seaweed variation remains a limitation.

87 Value

North Atlantic Kelp

Solgar

The favorable balance of serving cost and formulation provides 200 mcg of iodine from Atlantic kelp; compared with the original, the 200 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The appropriate dose and very low serving cost create excellent practical value.

86 Value

Icelandic Kelp

NaturesPlus

The favorable balance of serving cost and formulation provides 150 mcg of iodine from Icelandic kelp; compared with the original, the 150 mcg iodine amount is lower than the original 400 mcg and the seaweed-based approach is retained. The focused design offers excellent value for iodine support but does not provide broader energy ingredients.

Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Association of radioactive iodine treatment with survivorship symptoms and primary care utilisation in women of reproductive age with thyroid cancer: a retrospective cohort study.
    Devanarayan P; Hartman M; Partin M · Family medicine and community health · 2026
    Cohort study10,882 participantsEnergy forIodine
  2. Energy level and fatigue after surgery for thyroid cancer: A population-based study of patient-reported outcomes.
    Hughes DT; Reyes-Gastelum D; Kovatch KJ; Hamilton AS; Ward KC; Haymart MR · Surgery · 2020
    Cohort study2,584 participantsEnergy forIodine
  3. Health-Related Quality of Life in Differentiated Thyroid Cancer Survivors: A Cross-Sectional Study From Turkey.
    Gültekin A; Kahraman MY; Şengöz T; Şimşek FS · Head & neck · 2026
    Cross-sectional study202 participantsEnergy forIodine