Vitamin D3 with Sea-Iodine
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Vitamin D1526 systematic reviews · 3105 randomised trials | 125 mcg |
| Iodine101 systematic reviews · 210 randomised trials | 1000 mcg |
Certifications & Testing
Other Ingredients
Microcrystalline Cellulose, Vegetable Cellulose, Maltodextrin, modified Food Starch, Silica, Stearic Acid
Recommended Use
Read the entire label and follow the directions carefully prior to use. Directions: Take one (1) capsule daily with food, or as recommended by a healthcare practitioner. 1 daily
Warnings
Caution: Individuals consuming more than 50 mcg (2,000 IU)/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Do not exceed 10,000 IU per day unless recommended by your doctor. Vitamin D supplementation is not recommended for individuals with high blood calcium levels. If you have a thyroid condition or are taking antithyroid medicatio
Frequently Asked Questions
What is Life Extension Vitamin D3 with Sea-Iodine's Formulate score?
Life Extension Vitamin D3 with Sea-Iodine scores 85 out of 100 (grade A-) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Life Extension Vitamin D3 with Sea-Iodine worth it?
Life Extension Vitamin D3 with Sea-Iodine scores 85/100 (grade A-). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Life Extension Vitamin D3 with Sea-Iodine?
Each serving contains Vitamin D (125 mcg), Iodine (1000 mcg). Serving size: 1 Capsule(s). 60 servings per container.
How do I take vitamin d3 with sea-iodine?
Read the entire label and follow the directions carefully prior to use. Directions: Take one (1) capsule daily with food, or as recommended by a healthcare practitioner. 1 daily
Who makes Vitamin D3 with Sea-Iodine?
Vitamin D3 with Sea-Iodine is made by Life Extension. See Formulate's full grade and product lineup for Life Extension on its brand page.
Is Life Extension Vitamin D3 with Sea-Iodine third-party tested?
Life Extension lists the following certifications and testing for this product: Non GMO LE Certified, Gluten-Free.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.