1 / 7Life Extension Sea-Iodine, 1,000 mcg, 60 Capsules
Capsules: Life Extension Sea-Iodine is a capsule-based iodine supplement marketed to support thyroid hormone production. The listing gives 1,000 mcg per capsule, while also claiming 667% of the daily value, so review the dose against your needs before choosing it.
At a glance
- The manufacturer describes iodine as supporting production of thyroid hormones T3 and T4.
- The listing says the formula is algae-derived and provides iodine without table salt.
- Manufacturer claims include non-GMO, gluten-free, vegetarian, and made in the USA.
Reference price: $6.00
Price checked: Nov 12, 2026
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Pros and cons
Pros
- A listed 1,000 mcg per capsule makes the iodine amount explicit for shoppers comparing supplement doses.
- Capsule format offers an alternative to iodine from iodized salt.
- The reported small capsule size and ease of swallowing may suit people who prefer compact capsules.
Technical specifications
5 specifications| Brand | Life Extension |
|---|
| Iodine per capsule | 1000 mcg per capsule |
|---|---|
| Bottle count | 60 Capsules |
| Dietary claims | non-GMO, gluten-free, vegetarian |
| Dimensions listed | 1.84 x 1.84 x 3.23 inches; 1.28 ounces |
|---|
What to know before buying
Listing details to confirm
The listing is internally inconsistent about the daily value: it states 1,000 mcg per capsule and 667% of daily value, but does not reconcile those claims. Check the current label and dose guidance before use.
Who is it for?
A good fit for
- People seeking a capsule-form iodine supplement rather than getting iodine through table salt.
- Shoppers comparing a clearly stated iodine amount per capsule and a 60-capsule bottle.
Less suited to
- Anyone seeking an iodine amount close to the listing's cited 150 mcg daily recommended intake without first confirming the appropriate dose.
Customer reviews on Amazon
- 5 stars
76% 76% - 4 stars
14% 14% - 3 stars
7% 7% - 2 stars
1% 1% - 1 star
2% 2%
Customer feedback highlights perceived effectiveness, product quality, ease of swallowing, and a small capsule size, with some customers reporting feeling better quickly. These are customer perceptions, not evidence of a clinical effect. Some customers report nausea or headaches, which may matter when considering a capsule containing the listing-stated 1,000 mcg of iodine. Aggregate ratings lean positive overall, but do not explain individual experiences.
Positive themes
- Customers report good product quality and ease of swallowing, including appreciation of the small capsule size.
- Some customers describe perceived benefits and value for money.
Negative themes
- Some customers report nausea and headaches.
Mixed feedback
- Feedback includes reports of feeling better as well as reports of side effects.
Frequently asked questions
How much iodine does each capsule contain?
The listing states 1000 mcg per capsule. It also claims 667% of the recommended daily value, a discrepancy that buyers should check against the current product label.
What does the manufacturer say Sea-Iodine is for?
The manufacturer describes iodine as supporting production of thyroid hormones T3 and T4. This is a supplement claim, not a promise to treat a thyroid condition.
Is the supplement vegetarian?
The listing describes the formula as vegetarian, non-GMO, and gluten-free.
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