The best iodine-from-sea-kelp supplement depends on the labeled iodine amount, serving format, and whether you prefer a straightforward kelp tablet or a broader sea-vegetable blend. Carlyle is a clear-dose option at 225 mcg per tablet, Dr. Berg provides 200 mcg in a capsule, and Nutricost offers 325 mcg per tablet. Triquetra and Peak Performance emphasize whole-food or organic ingredients; check their labels for the iodine amount before choosing.
| Product | Listed iodine | Format or focus |
|---|---|---|
| Carlyle Sea Kelp | 225 mcg per tablet | 300 tablets |
| Dr. Berg Icelandic Sea Kelp | 200 mcg | 90 capsules |
| Triquetra Sea Vegetable Complex | Not specified in provided details | Organic whole-food blend |
| Peak Performance Raw Kelp | Not specified in provided details | Organic vegan capsules |
| Nutricost Sea Kelp | 325 mcg per tablet | 240 tablets |
Carlyle Sea Kelp Iodine
Carlyle is best for shoppers who want a kelp-derived iodine supplement with a clearly stated amount per tablet. The listed serving provides 225 mcg of iodine, which the product identifies as 150% of the daily value. The bottle contains 300 tablets, making this a large tablet-count option among the products compared here.
Choose this if you want a simple kelp tablet and a labeled iodine amount. Its stated 225 mcg falls between the 200 mcg Dr. Berg option and the 325 mcg Nutricost option. The provided product details do not specify other active ingredients. Check the current label for serving directions and full ingredient information before use.
Dr. Berg Icelandic Sea Kelp
Dr. Berg is best for buyers who prefer capsules and want a stated 200 mcg of iodine. The listed formula also contains a 135 mg proprietary blend of algae and sea kelp, and the brand describes the kelp as sourced from Iceland. The product is presented as non-GMO, and its listing states that manufacturing takes place in U.S. facilities described as GMP certified.
Choose this if a capsule and an iodine amount below the 225 mcg and 325 mcg tablet options suit your comparison. One limitation is that the 135 mg blend amount is not the same as the iodine amount; the listing identifies iodine separately as 200 mcg. Review the Supplement Facts panel to confirm the serving size and ingredients.
Triquetra Organic Sea Vegetable Complex
Triquetra is best for shoppers seeking a whole-food-style blend rather than a product described only as kelp. Its listed ingredients include organic kelp, organic Irish moss, and organic bladderwrack. The brand describes the kelp as grown in Northwest Iceland near the fjords and Arctic Circle.
Choose this if an organic sea-vegetable complex is a priority. The provided product details do not state the iodine amount, so it is not possible to compare its dose with Carlyle, Dr. Berg, or Nutricost from this information alone. Check the label for iodine per serving and the serving size before deciding whether it matches your needs.
Peak Performance Organic Raw Kelp
Peak Performance is best for buyers who prioritize an organic, vegan capsule and a raw whole-food kelp formula. The product identifies its kelp as Ascophyllum nodosum and states that it is free of gluten, GMOs, additives, preservatives, artificial colors, soy, and dairy. The listing also describes the product as manufactured under GMP regulations and U.S. standards.
Choose this if those dietary and ingredient preferences matter more than comparing a clearly stated iodine dose from the supplied details. The listing information provided here does not give the iodine amount per serving. Confirm the Supplement Facts label before use, especially if you are selecting a supplement to meet a particular iodine target.
Nutricost Sea Kelp Iodine
Nutricost is best for shoppers looking for the highest stated iodine amount among the products in this comparison. Each tablet provides 325 mcg of natural iodine from sea kelp, and the bottle contains 240 easy-to-swallow tablets. That listed amount is higher than Carlyle’s 225 mcg and Dr. Berg’s 200 mcg.
Choose this if 325 mcg per tablet fits your intended intake. Avoid treating the larger number as automatically better: iodine needs and total intake vary, and the product details do not provide a reason to choose a higher dose for every buyer. Check the label for serving directions and consider iodine from food and other supplements.
Buying Guide: How to Choose Iodine From Sea Kelp
How much iodine does each serving provide?
Compare the iodine amount in micrograms, not just the weight of kelp or a proprietary blend. Of these five products, Carlyle lists 225 mcg per tablet, Dr. Berg lists 200 mcg, and Nutricost lists 325 mcg per tablet. The supplied details for Triquetra and Peak Performance do not state an iodine amount, so verify their current labels before comparing doses.
Should you choose a tablet, capsule, or blend?
Tablets may suit buyers who want a clearly stated kelp iodine amount, while capsules may better match those who prefer that format. A sea-vegetable blend may appeal to shoppers seeking several plant ingredients, but ingredient variety does not replace checking the iodine dose. Consider serving size and the full ingredient list as well as format.
What safety points should buyers consider?
Iodine is an essential nutrient, but more is not always appropriate. Total intake includes food and other supplements, and both too little and too much iodine can be a health concern. Ask a healthcare professional before starting an iodine supplement if you have a thyroid condition, are pregnant or breastfeeding, or take medication that may affect thyroid function.
What should you verify on the label?
Confirm the iodine amount per serving, number of tablets or capsules per serving, other active ingredients, and any allergen or dietary statements relevant to you. Product details can change, so use the current package label as the final reference.
Frequently Asked Questions
Is iodine from sea kelp the same as kelp weight?
No. Kelp weight and iodine amount are different measurements. Compare the iodine figure in micrograms on the Supplement Facts label.
Which listed product has the most iodine per tablet?
Nutricost lists 325 mcg per tablet, the highest stated amount among these products. A higher amount is not necessarily the right choice for every person.
Which options clearly state their iodine amounts?
Carlyle lists 225 mcg per tablet, Dr. Berg lists 200 mcg, and Nutricost lists 325 mcg per tablet. The supplied details for Triquetra and Peak Performance do not specify a dose.
Can I take a kelp iodine supplement with another multivitamin?
Check both labels to calculate your total iodine intake, and ask a healthcare professional if you are unsure. Some multivitamins may contain iodine.