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Life Extension Vitamins D and K with Sea-Iodine
SPECIMEN #LIFE-EXT
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VitaminsLife Extension

Vitamins D and K with Sea-Iodine

Bone health, cardiovascular support, and thyroid function.. The product provides premium forms and clinical doses of D3 and K vitamins, which work synergistically for bone and heart health. However, the 1000mcg iodine dose is significantly above the RDA and near the upper limit, making it potentially too high for general use or for individuals sensitive to iodine.

8.0/10
EXCELLENT

This product offers excellent forms and doses of Vitamins D and K, but the high iodine content makes it unsuitable for everyone.

5 ingredientsCapsules60 servings
We'd recommend this
Evidence
8.5
Dosing
7.0
Synergy
9.0
Official SiteAnalyze My Stack
Whenwith meals

Fat-soluble vitamins D and K are best absorbed with dietary fat.

Foodwith food

Ensures optimal absorption of fat-soluble vitamins D and K.

SafetySome cautions

The 1000mcg iodine dose is very high and close to the tolerable upper intake level (UL). Consult a doctor before use, especially if you have a thyroid condition or are taking thyroid medication.

ResearchStrong evidence

Extensive research supports the benefits of D3, K1, K2, and iodine for their respective roles.

What We Like

  • Clinical dose of Vitamin D3.
  • Excellent forms and clinical dose of Vitamin K2 (MK-7).
  • Strong synergy between D3 and K vitamins.

Watch Out For

  • Very high iodine dose, potentially excessive for many users.

What We Analyzed

Vitamins D and K with Sea-Iodine Supplement Facts

Verified Supplement Facts

Every dose checked against clinical research

We analyzed the actual supplement facts panel for this product. Every ingredient dose below was cross-referenced with published clinical trials to determine if it matches what studies actually use.

12 ingredients analyzed2 at clinical doses

Source: Official product page

Ingredient Breakdown

2 clinical
Clinical Adequate Underdosed Overdosed|Bar = % of clinical dose
IngredientDoseStatusvs. Clinical
Vitamin D310.0
125 mcgCLINICAL
125%
125 mcg

of 4000IU

CLINICAL
125%
Vitamin K110.0

phytonadione

1000 mcgOVERDOSED
833%
1000 mcg

of 120mcg

OVERDOSED
833%
Vitamin K210.0

menaquinone-4

1000 mcgOVERDOSED
1000%
1000 mcg

of 100mcg

OVERDOSED
1000%
Vitamin K210.0

trans menaquinone-7

100 mcgCLINICAL
100%
100 mcg

of 100mcg

CLINICAL
100%
Iodine9.0®

Sea-Iodine™ Complex

1000 mcgOVERDOSED
500%
1000 mcg

of 200mcg

OVERDOSED
500%
In our database (click to learn more) Not yet reviewed
Other Ingredients(inactive)

microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, food starch-modified, dicalcium phosphate, stearic acid, silica

Our Analysis

Best For

Individuals looking for comprehensive bone and cardiovascular support.Those with confirmed iodine deficiency under medical supervision.People seeking a combined D and K supplement with additional thyroid support.

Skip This If

Individuals with thyroid conditions (e.g., Hashimoto's, hyperthyroidism) without medical advice.People with sufficient iodine intake or sensitivity to high iodine doses.Pregnant or breastfeeding women without consulting a doctor due to high iodine.

Time to Feel

4-8 weeks

Value

FAIR

How to take: No cycling needed for these vitamins at these doses, but monitor iodine intake.

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