Vitamins D and K with Sea-Iodine, 60 Capsules
by Life Extension
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5,000 IU of D3 paired with 2,100 mcg of vitamin K — including MK-7, confirmed by reviewers — is a genuinely well-thought-out combination: MK-7 directs calcium to bones rather than arteries, which is the whole point of taking D3 alongside K. Best for People with confirmed vitamin D deficiency who also want calcium-routing K2 support in one capsule and Those with low sun exposure — referenced by multiple reviewers as the core reason for purchase.
According to the AIScored 0–100 scoring system, Vitamins D and K with Sea-Iodine, 60 Capsules by Life Extension scores 73.0/100, ranking #6 out of 6 products in Vitamin K (2026). Strongest category: Ingredient Quality (82.0/100). Weakest: Certifications (38.0/100).
Is Vitamins D and K with Sea-Iodine... worth buying?
“Life Extension's D and K with Sea-Iodine scores a respectable 79/100, combining D3, K2 (in the synergistic MK-7 form), and natural sea-plant iodine into one capsule. This is particularly useful if you want your bones absorbing calcium efficiently rather than it accumulating in your arteries, and the marine iodine source is worth noting over synthetic alternatives.”
What Do Reviewers Say About Vitamins D and K with Sea-Iodine, 60 Capsules?
Sample excerpts from currently available source material used in this product analysis.
"All-in-one support for bones, immunity, and thyroid!. I’m very impressed with this combination of vitamins D3, K2, and Sea-Iodine. It’s so convenient to have these essential nutrients together in one capsule — great for supporting bone heal..."
"Distinguished. I love this company because of their excellent quality, ingredients, quantity and dosage are also considered excellent compared to other companies. Due to the presence of K2, absorption is higher. This product contains marine..."
"Excellent!. I really liked the shape of these tablets - they have a convenient, neat size, so they are easy to swallow even for those who usually have difficulty taking large pills. The tablets do not get stuck in the throat, the size is op..."
"Vitamin D and K with marine iodine has excellent quality, improves immunity and replenishes an important vitamin for the whole body. The size is standard, the dosage has a balanced composition."
"The best vitamin I have used. The quantity is large and excellent for those who have a vitamin D deficiency. It is amazing. Honestly, I recommend it. I will order it again."
How does Vitamins D and K with Sea-Iodine, 60 Capsules score?
Detailed score breakdown and key findings from our analysis of 50 reviews across 1 source.
Pros
- +D3 at 5,000 IU is a meaningful therapeutic dose for deficiency — multiple reviewers specifically bought it to address low vitamin D
- +MK-7 form of K2 is the right choice for calcium regulation; reviewers with endocrinologist guidance specifically chose this product
- +Marine-sourced iodine for thyroid support, noted by several reviewers as preferable to synthetic potassium iodide
- +Capsules consistently praised as small and easy to swallow — no discomfort reported
- +Two-month supply at one capsule daily, with several repeat buyers citing ongoing satisfaction
Cons
- -1,000 mcg iodine is at the tolerable upper limit; one reviewer explicitly warns this dose is not suitable for continuous daily use without monitoring
- -No third-party testing confirmed — Life Extension has a strong reputation, but no independent verification of label accuracy or contamination testing
- -Noticeably more expensive than standalone D3 products — one reviewer specifically compared it unfavourably to basic Thorne D3 drops on price
- -Not vegan, which limits suitability for plant-based users
Best For
Watch Out
- !The 1,000 mcg iodine dose is not appropriate for people with existing thyroid conditions, hyperthyroidism, or those already consuming iodine-rich diets or other iodine supplements — the product label itself advises consulting a doctor
- !5,000 IU D3 warrants periodic blood testing to avoid toxicity over the long term — the label recommends monitoring serum 25-hydroxyvitamin D
- !Those on anticoagulants should be cautious with the high vitamin K content
What is Vitamins D and K with Sea-Iodine, 60 Capsules?
Vitamins D and K with Sea-Iodine, 60 Capsules is a vitamin k product by Life Extension, scoring 73.0/100 on AIScored.
- • This once-daily capsule delivers 125 mcg (5,000 IU) of vitamin D3, 2,100 mcg of vitamin K, and 1,000 mcg of iodine from a sea plant complex to support bone, brain, thyroid and vascular health.
- • Vitamin D helps maintain healthy cognitive function, bone density and immune health.
- • Vitamin K supports your body's calcium balance, which plays a role in cardiovascular health and helps inhibit calcium buildup in the arteries.
- • Iodine is a trace element essential for the production of thyroid hormones T3 and T4, and may help counteract deficiency in typical diets.
- • Together, these three nutrients offer broad daily support for some of the body's most important systems.
- • Gluten-free and non-GMO.
- • Take one capsule daily with food, or as directed by a healthcare professional.
Is Vitamins D and K with Sea-Iodine, 60 Capsules Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
How Does Vitamins D and K with Sea-Iodine, 60 Capsules Compare?
See how this product stacks up against the top-rated vitamin k in our database.
| Product | Score | Price |
|---|---|---|
| Vitamins D and K with Sea-Iodine... (this) | 73.0 | £14.36 |
| NOW Foods MK-7 Vitamin K-2 100mc... | 85.0 | £21.99 |
| MK-7 Vitamin K-2, 100 mcg, 120 V... | 83.0 | £24.23 |
| Vitamin K2 + D3, 120 Capsules | 80.0 | £12.99 |
Price History (90 days)
Quick Facts
- Vegan
- No
Frequently Asked Questions
Is Vitamins D and K with Sea-Iodine, 60 Capsules worth buying in 2026? ▼
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Is Vitamins D and K with Sea-Iodine, 60 Capsules third-party tested? ▼
How does Vitamins D and K with Sea-Iodine, 60 Capsules compare to NOW Foods MK-7 Vitamin K-2 100mcg - 60 Veg Capsules? ▼
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
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