Vitamin D3 with Sea-Iodine™

125 mcg (5000 IU), 60 capsules Item # 01758

Vitamin D3 with Sea-Iodine™ 125 mcg (5000 IU), 60 capsules - Life Extension

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Vitamin D3 with Sea-Iodine™

125 mcg (5000 IU), 60 capsules Item # 01758

Maintaining healthy levels of vitamin D helps support cognitive health, promotes bone health and encourages healthy blood vessel function. It also helps maintain already-healthy blood pressure levels.

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I have used this for years to maintain optimal levels.

Ginny, CA

Easy way to get my Vitamin D!

In Pursuit of Health, KY

I take one every day.

Sara, ID

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Vitamin D3 with Sea-Iodine™

125 mcg (5000 IU), 60 capsules

  • $10.50
  • Sale $6.30
  • Save 40%

$0.10/count | 60 Day Supply

What Is Vitamin D3 with Sea-Iodine?

We’ve combined vitamin D3 with iodine for dual-action health support. Iodine is essential for supporting thyroid hormone production. Maintaining healthy vitamin D levels helps support cognitive, bone and immune system health. It also helps maintain already-healthy blood pressure and supports a healthy inflammatory response, endothelial function and more.

Many people need 125 mcg (5,000 IU) to 200 mcg (8,000 IU) of vitamin D3 a day to promote optimal health. This formula has 125 mcg (5,000 IU) of vitamin D3.

Vitamin D3 with Sea-Iodine™ Benefits

  • Supports bone density, cell differentiation and immune health
  • Provides iodine, a trace mineral essential to supporting healthy thyroid function
  • Helps counteract iodine deficiency in modern healthy diets
  • Shown to support vitamin D levels
  • Sea-Iodine™ derived from organic sea algae

Get the Vitamin D3 & Iodine you Need

Iodine is essential for the supporting the production of thyroid hormones. But if you're watching your added salt intake, you may not be getting enough (most brands of common table salt have added iodine). Our formula delivers 125 mcg (5,000 IU) of vitamin D3 and 1,000 mcg of iodine in every capsule.

Vitamin D

Why Should I Supplement With Vitamin D3 with Sea-Iodine™?

Customer: To me, there's nothing better than being outside on a really nice day. Whether I'm working in my garden or taking a walk with my family, we all love the outdoors. But during my last checkup, the doctor noticed that I wasn't getting enough vitamin D.

Michael A. Smith, MD: From your brain to your heart, your bones to your immune system, vitamin D affects nearly every cell in your body and is critical for optimal health. Even if you spend a lot of time outdoors, your body may not be producing enough of this important vitamin. In fact, studies show that people are really low in vitamin D—and that's why doctors are recommending it to their patients more than ever.

Customer: So, my body needs more vitamin D, but there are all these different doses and options. How can I decide which is best for me?

Michael A. Smith, MD: Like all of our products, Life Extension’s Vitamin D3 is made with the highest quality standards. We recommend taking 5,000 international units a day, but we offer doses ranging from 1,000 to 7,000 units depending on your vitamin D blood level. Be sure to check with your doctor to see which one is right for you. We also offer Vitamins D and K with Sea-Iodine™ for a complete vitamin D formulation.

Customer: Three weeks in, and vitamin D has really made an impact on my whole life. I have more energy and overall, I feel for lack of a better word…sunnier.

Dr. Michael A. Smith, MD: Director of Education and Spokesperson for Life Extension.

Iodine is essential for thyroid health

Iodine is a trace element essential for supporting the production of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). The thyroid gland actively absorbs iodide from the blood in order to make and release these hormones. Iodine is abundant in seafood and sea vegetables, but not everyone likes or has access to marine foods and vegan diets sometimes lack adequate iodine.1

These statements have not been evaluated by the Food and Drug Administration.
These products are not intended to diagnose, treat, cure, or prevent any disease.
Supplement Facts

Serving Size 1 capsule

Amount Per Serving

Vitamin D (as cholecalciferol)

125 mcg

Iodine [from Sea-Iodine™ Complex Blend (organic kelp and bladderwrack extracts, potassium iodide)]

1,000 mcg

Other ingredients: microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, modified food starch, silica, stearic acid.


Dosage and Use
  • Take one (1) capsule daily with food, or as recommended by a healthcare practitioner.

Individuals consuming more than 50 mcg (2000 IU)/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Do not exceed 10000 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 medications, do not use without consulting your healthcare practitioner.

  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

To report a serious adverse event or obtain product information, contact 1-866-280-2852.

Actual Size

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  1. Nutrients. 2018;10(2)
  2. Nutrients. 2019;11(4)
  3. Journal of the American Geriatrics Society. 2017;65(10):2161-2168.
  4. Molecular and Cellular Endocrinology. 2017;453:46-51.
  5. Histochemistry and Cell Biology. 2018;149(4):305-312.
  6. J Steroid Biochem Mol Biol. 2018;177:70-76.
  7. Endocrinology and Metabolism Clinics of North America. 2017;46(4):1061-1094.
  8. Nutrients. 2013;5(7):2502-21.
  9. J Am Coll Cardiol. 2011;58(2):186-92.
  10. Hypertension. 2011;57(1):63-9.
  11. Expert Rev Cardiovasc Ther. 2010;8(11):1599-608.

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Full product reviews disclaimer

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