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Shop All Life Extension

Vitamins D and K with Sea-Iodine (60 Capsules)

Rated 4.9 out of 5
382 Reviews2 Questions126 Answers
Gluten FreeNon-GMO

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Product Info

About This Product

  • Supports bone, immune, cardiovascular, and thyroid health
  • With 1,000mcg of salt-free Sea-Iodine™
  • Non-GMO and gluten-free

This convenient, once-daily supplement from Life Extension combines vitamin D3, vitamin K, and Sea-Iodine for triple-action health support. It promotes cognitive health, healthy bone density, and immune function with 125mcg of vitamin D3; helps maintain optimal calcium balance with 2,100mcg of vitamin K; and supports the production of thyroid hormones with 1,000mcg of Sea-Iodine.

Frequently Asked Questions

What is Sea-Iodine?

Sea-Iodine is a proprietary formula made from organic marine algae designed to support healthy iodine levels without the use of salt. Many individuals choose to avoid table salt in an effort to minimize their sodium intake, but reduced iodized salt intake can lead to suboptimal iodine levels.

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Directions

Take one (1) capsule once daily with food, or as recommended by a healthcare practitioner.

Warning

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 250 mcg 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. If you are taking anticoagulant or antiplatelet medications, or have a bleeding disorder, consult with your healthcare provider before taking this product. KEEP OUT OF REACH OF CHILDREN. DO NOT EXCEED RECOMMENDED DOSE. 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. Store tightly closed in a cool, dry place.

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Supplement Facts

Serving Size: 1 Capsule
Number of Servings: 60 Servings
Amount Per Serving
% Daily Value
VITAMIN D  - (AS CHOLECALCIFEROL)
625%
VITAMIN K ACTIVITY  - VITAMIN K1 (AS PHYTONADIONE) 1000 MCG VITAMIN K2 (AS MENAQUINONE-4) 1000 MCG VITAMIN K2 (AS MENAQUINONE-7) 100 MCG
1750%
IODINE  - (FROM SEA-IODINETM COMPLEX BLEND (ORGANIC KELP AND BLADDERWRACK EXTRACTS, POTASSIUM IODIDE)
667%

Other Ingredients:

Microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, modified food starch, dicalcium phosphate, stearic acid, silica.

Specifications

Brand:
Life Extension
Form:
Capsules
Serving Size:
1 Capsule
Number of Servings:
60 Servings
Price per Serving:
($0.37 / serving)
Product Weight:
2  OZ
Specialty Diets:
Gluten Free ,  Non-GMO
Item # :
UX-1079 / 2018794

Product Reviews
   (382)

382 Ratings
4.9out of 5 stars
382 Ratings

Rated 5 stars by 93% of reviewers

Rated 4 stars by 5% of reviewers

Rated 3 stars by 0% of reviewers

Rated 2 stars by 1% of reviewers

Rated 1 star by 0% of reviewers

Would you recommend?
1-10 of 382 Reviews
Customers talk about
Jun 22, 2026
Rated 5 out of 5
A supplement you need to have!
A very valuable supplement that provides 3 crucial nutrients in one package. The ordering and shipping process went without a hitch. I highly recommend this supplement to prospective customers.
JOHN
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
Jun 13, 2026
Rated 5 out of 5
Solid D3+K2, Stack w/ Trace Minerals
This one is a strong addition to my supplement rotation.I like the mix of MK-7 and MK-4, and the Sea Iodine makes this product a little different than others out there (I'd rather it be in the Only Trace Minerals blend, but I also appreciate the variation).Stacking this D3+K2 with Only Trace Minerals is a solid foundation.
Kyle
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
Jun 9, 2026
Rated 5 out of 5
A must
Essential
Daniel
Location
Undisclosed
Was this helpful?
Jun 5, 2026
Rated 5 out of 5
Vitamin D and K
Dr advised to take LE brand after labs
OLEN
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
May 23, 2026
Rated 5 out of 5
Great product!
Just works wonderfully. I take every day. Thanks for a great product!
Debra
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
May 18, 2026
Rated 5 out of 5
Vitamins D and K with Sea Iodine
Exactly what I ordered and I trust Life Extention supplements
Theresa
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
Apr 26, 2026
Rated 5 out of 5
Sounds weird, but if I take before bedtime I sleep thru night
accidently discovered taking before bedtime helped with insomnia
cindy fVerified Purchaser
Location
AK, US
Gender
Female
Age Range
65+
Would you recommend?:Yes
Purchased on Sep 28, 2025
Was this helpful?
Mar 18, 2026
Rated 5 out of 5
Just what I was looking for
great
SUSAN
Location
Undisclosed
Was this helpful?
Mar 16, 2026
Rated 5 out of 5
Important vitamin - low in alot of Americans !
Important nutrient for most Americans !!
MPM
Location
OH
Would you recommend?:Yes
Was this helpful?
Mar 16, 2026
Rated 5 out of 5
Great results with this tiny capsule!
I love this tiny little capsule. I have my D&K blood levels tested every six months and since using this supplement, my levels have been great.
Donna
Location
Undisclosed
Would you recommend?:Yes
Was this helpful?
Disclaimer:

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of the Vitamin Shoppe. Vitamin Shoppe does not verify or endorse any claims made in these reviews.Please read the full product reviews disclaimer.

Q&A

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Start typing and see existing answers.
2 Questions
Why did you choose this?
The Vitamin ShoppeStore

need vitamin d

Bob F

Great brand

Christy D

Like it

Nic V

A lot of D supplements are too high 5000 when combined with k. My doctor said my vitamin D was higher than it should be.

VIKI L
I can find where is says what the IU are fod D3 and the K for this product?
A shopper

Best Answer:  5000

Stephen C
Disclaimer:

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of the Vitamin Shoppe. Vitamin Shoppe does not verify or endorse any claims made in these reviews.Please read the full product reviews disclaimer.

Shipping Info

 

FREE STANDARD SHIPPING on orders of $45 or more

How to get FREE Standard Shipping:

  1. Ship to an address within the United States (including U.S. territories)
  2. Place your online order of $45 or more* - after promotions and before tax are applied
  3. Use "Standard" shipping option at checkout

Orders will be shipped within 24 hours of order placement*, pending verification of billing information and shipping method selected. International orders and orders containing gift cards or items that are not currently in stock will be processed as quickly as possible.

 

*Excludes all orders placed on major US holidays (Memorial Day, Independence Day, Labor Day, Thanksgiving Day, Christmas Day and New Year's Day).

 

Orders for states outside of the continental U.S. (including those of $45 or more) may be subject to a delivery surcharge. This will be noted in the order summary based on your shipping address at checkout.

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