MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules vs Vitamins D and K with Sea-Iodine, 60 Capsules

Side-by-side comparison of scores, ingredients, prices and real customer feedback for MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules and Vitamins D and K with Sea-Iodine, 60 Capsules.

Last verified: 07 Apr 2026 · Based on 100 reviews

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83.0

Quick Answer

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules scores 83.0/100 vs Vitamins D and K with Sea-Iodine, 60 Capsules at 73.0/100. MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules wins on effectiveness, ingredient quality, value for money.

Which is better: MK-7 Vitamin K-2, 100 mcg, ... or Vitamins D and K with Sea-I...?

NOW Foods MK-7 wins with an 83 vs 79 overall score, stronger value (86 vs 71), and no concerns about excessive iodine or high-dose D3 requiring blood monitoring. The Life Extension option suits those who want D3, K2, and iodine in one capsule and are under medical supervision — its 5,000 IU D3 and 1,000 mcg iodine demand clinical oversight.

— AIScored Editorial Team

How Do the Scores Compare?

MK-7 Vitamin K-2, 100 mcg, ...

Vitamins D and K with Sea-I...

	MK-7 Vitamin K-2, 100 mcg, ... NOW Foods	Vitamins D and K with Sea-I... Life Extension
Overall Score	83.0	73.0
Effectiveness	82.0/100 Best	77.0/100
Ingredient Quality	88.0/100 Best	82.0/100
Value for Money	86.0/100 Best	68.0/100
Side Effects	92.0/100 Best	80.0/100
Certifications	60.0/100 Best	38.0/100
Best Price	£24.23 iHerb →	£14.36 iHerb → Cheapest
Form	None	None
Dose	None	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	50	50

MK-7 Vitamin K-2, 100 mcg, 120 V...

Pros

✓Uses MenaQ7® — a patented MK-7 form with published clinical trial data, not generic menaquinone-7
✓100 mcg is the evidence-based daily dose for bone mineralisation and vascular calcium management
✓Small capsules consistently praised across reviews as tasteless, odourless, and easy to swallow
✓Soy-free despite K2 typically being derived from natto fermentation — clean excipient list too

Cons

✗Not independently third-party tested per product specs — quality relies on NOW Foods' own GMP processes
✗Requires medical consultation for anyone taking anticoagulants such as warfarin or heparin

Best For

Anyone supplementing vitamin D3 at doses above 2000 IU daily who wants to manage calcium distribution Adults over 40 focused on long-term bone density and arterial health People who need a soy-free K2 source

iHerb £24.23

View full review →

Vitamins D and K with Sea-Iodine...

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

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

People with confirmed vitamin D deficiency who also want calcium-routing K2 support in one capsule Those with low sun exposure — referenced by multiple reviewers as the core reason for purchase Post-partum women — several reviewers specifically mentioned using it after pregnancy and breastfeeding to address multiple deficiencies Anyone wanting D3+K2+iodine without managing three separate supplements

iHerb £14.36

View full review →

What does the data say about MK-7 Vitamin K-2, 100 ... vs Vitamins D and K with ...?

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules uses a patented form called MenaQ7 rather than generic menaquinone-7. This specific ingredient has published clinical trial data to support its use. It provides a 100 mcg dose, which is the standard amount for bone mineralisation. Vitamins D and K with Sea-Iodine takes a different approach by mixing 5,000 IU of Vitamin D3 with MK-7 and 1,000 mcg of iodine. This iodine comes from marine sources. It is a very high dose. One reviewer warns that this level of iodine is not for continuous daily use without medical monitoring.

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules is the better option for adults over 40 or anyone taking high doses of D3. It scores 83.0/100 overall and 86.0/100 for value. At £24.23, it is more expensive than the competition but offers better ingredient quality at 88.0/100. Vitamins D and K with Sea-Iodine costs £14.36 and suits post-partum women or those with a confirmed vitamin D deficiency. However, its value score is much lower at 68.0/100.

The capsules from NOW Foods are small and easy to swallow. They are tasteless and odourless. This product is also a safe bet for people who need a soy-free K2 source. You must consult a doctor before using MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules if you take blood thinners like warfarin or heparin. Vitamins D and K with Sea-Iodine is often chosen by people with low sun exposure. It scores 77.0/100 for effectiveness, while MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules reaches 82.0/100.

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules Winner 83.0/100

The MenaQ7® form sets this apart from budget K2 alternatives.

Effectiveness

MK-7 Vitamin K-2..

82.0/100

Vitamins D and K..

77.0/100

Ingredient Quality

MK-7 Vitamin K-2..

88.0/100

Vitamins D and K..

82.0/100

Value for Money

MK-7 Vitamin K-2..

86.0/100

Vitamins D and K..

68.0/100

Side Effects

MK-7 Vitamin K-2..

92.0/100

Vitamins D and K..

80.0/100

Certifications

MK-7 Vitamin K-2..

60.0/100

Vitamins D and K..

38.0/100

What are the key differences?

MK-7 Vitamin K-2, 100 m.. is best for: Anyone supplementing vitamin D3 at doses above 2000 IU daily who wants to manage calcium distribution, Adults over 40 focused on long-term bone density and arterial health

Vitamins D and K with S.. is best for: People with confirmed vitamin D deficiency who also want calcium-routing K2 support in one capsule, Those with low sun exposure — referenced by multiple reviewers as the core reason for purchase

Frequently Asked Questions

Which is better, MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules or Vitamins D and K with Sea-Iodine, 60 Capsules? ▼

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules scores 83.0/100 overall while Vitamins D and K with Sea-Iodine, 60 Capsules scores 73.0/100. MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules comes out ahead, scoring higher on effectiveness (82.0 vs 77.0). MK-7 Vitamin K-2, 100 mcg, 120 is best suited for Anyone supplementing vitamin D3 at doses above 2000 IU daily who wants to manage calcium distribution and Adults over 40 focused on long-term bone density and arterial health. Vitamins D and K with Sea-Iodi is better 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.

Is MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules worth the price compared to Vitamins D and K with Sea-Iodine, 60 Capsules? ▼

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules costs £24.23 while Vitamins D and K with Sea-Iodine, 60 Capsules is £14.36. For value, MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules scores 86.0/100 vs Vitamins D and K with Sea-Iodine, 60 Capsules's 68.0/100. MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules delivers better value relative to its quality.

Which has fewer side effects? ▼

MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules scores 92.0/100 for side effects (higher means fewer reported issues) while Vitamins D and K with Sea-Iodine, 60 Capsules scores 80.0/100. Reviewers report fewer side effects with MK-7 Vitamin K-2, 100 mcg, 120 Veg Capsules. For certification and testing, MK-7 Vitamin K-2, 10 scores 60.0/100 vs Vitamins D and K wit's 38.0/100. Always consult a healthcare professional before starting any supplement.

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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.

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