Vitamins D and K with Sea-Iodine, 90 Caps (Pack of 2) - Daily Bone

In this review of the Life Extension Vitamins D and K with Sea-Iodine (Pack of 2), the bottom line is simple: this daily capsule bundle is for people who want a concentrated, once-daily dose of vitamin D3 together with multiple forms of vitamin K and iodine to support bone and cardiovascular health. The reviewer found it especially useful for those tracking vitamin D levels or seeking a supplement formulated without seed oils, and the pack of two makes it a straightforward value option for long-term use.

Key Features

• High potency D3: Delivers 125 mcg (5,000 IU) of vitamin D3 per capsule to help maintain healthy vitamin D status with one daily dose.
• Multiple K forms: Supplies vitamin K1 and two forms of vitamin K2 (menaquinone-4 and trans menaquinone-7) to support calcium metabolism and vascular health.
• Sea-iodine included: Provides 1,000 mcg of iodine from a sea plant complex for daily iodine intake alongside D and K.
• Convenient pack size: The twin 90-capsule pack offers a longer supply and better value for routine supplementation.
• Clean formulation: Gluten free and non-GMO, made in the USA with available Certificates of Analysis for transparency.

Who It's For

This supplement is best for adults who need a higher daily dose of vitamin D3 and want the added benefits of multiple vitamin K forms plus iodine in one capsule. It suits people monitoring serum vitamin D, those concerned with bone density, and anyone wanting a product without seed oils and with a clear sourcing statement.

People who need very low-dose vitamin D, are on strict iodine-restricted diets, or require personalized dosing should consult a healthcare provider and may want a different formulation that allows smaller incremental dosing or excludes iodine.

Pros & Cons

Pros

• High-strength vitamin D3 delivered in a single daily capsule for convenience.
• Combination of K1 and two K2 forms supports calcium routing to bone rather than soft tissue.
• Includes sea-iodine, adding iodine support alongside fat-soluble vitamins.
• Pack of two 90-capsule bottles offers clear value for ongoing use and is made in the USA.

Cons

• The 5,000 IU D3 dose may be higher than some users need, so people requiring lower doses must adjust under medical advice.
• The inclusion of iodine may not be suitable for those on iodine-restricted plans or with specific thyroid guidance.

Specifications

Product	Vitamins D & K with Sea-Iodine
Pack	90 Capsules per bottle, Pack of 2
Vitamin D3	125 mcg (5,000 IU) per capsule
Vitamin K1	1,000 mcg (phytonadione)
Vitamin K2	1,000 mcg MK-4 and 100 mcg MK-7 (trans menaquinone-7)
Iodine	1,000 mcg from sea-iodine
Other	Gluten free, non-GMO, manufactured in the USA

Our Verdict

This Life Extension D and K with Sea-Iodine pack is a strong choice for adults who want a once-daily, high-potency vitamin D3 with comprehensive vitamin K support and added iodine. It represents good value in the twin 90-cap pack and is especially appropriate for those tracking nutrient levels or prioritizing clean ingredient sourcing, though users needing lower D doses or no iodine should consult a clinician.

Frequently Asked Questions

Is the dose suitable for daily maintenance?
For many adults the 5,000 IU D3 dose is useful for maintenance, but individual needs vary so testing or medical advice is recommended.

Does this product contain gluten or GMO ingredients?
The formulation is labeled gluten free and non-GMO, and the brand states Certificates of Analysis are available.

Can this be taken with other supplements?
It can be combined with many regimens, but consult a healthcare provider if you take medications or have thyroid concerns because of the iodine and K content.