Vitamin K2 MK-7, 100 mcg, 240 Capsules vs Vitamins D and K with Sea-Iodine, 60 Capsules

Q: Which is better, Vitamin K2 MK-7, 100 mcg, 240 Capsules or Vitamins D and K with Sea-Iodine, 60 Capsules?

Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 76.0/100 while Vitamins D and K with Sea-Iodine, 60 Capsules scores 73.0/100 in our analysis. Vitamin K2 MK-7, 100 mcg, 240 Capsules is the higher-rated product overall.

Q: Is Vitamin K2 MK-7, 100 mcg, 240 Capsules worth the price compared to Vitamins D and K with Sea-Iodine, 60 Capsules?

Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 92.0/100 for value, while Vitamins D and K with Sea-Iodine, 60 Capsules scores 68.0/100. Check our price comparison above for the latest UK prices.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Vitamin K2 MK-7, 100 mcg, 240 Capsules and Vitamins D and K with Sea-Iodine, 60 Capsules.

Last verified: 07 Apr 2026 · Based on 100 reviews

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76.0

Quick Answer

Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 76.0/100 vs Vitamins D and K with Sea-Iodine, 60 Capsules at 73.0/100. Vitamin K2 MK-7, 100 mcg, 240 Capsules wins on effectiveness, value for money, side effects. Vitamins D and K with Sea-Iodine, 60 Capsules is stronger on ingredient quality.

How Do the Scores Compare?

Vitamin K2 MK-7, 100 mcg, 2...

Vitamins D and K with Sea-I...

	Vitamin K2 MK-7, 100 mcg, 2... Nutricost	Vitamins D and K with Sea-I... Life Extension
Overall Score	76.0	73.0
Effectiveness	78.0/100 Best	77.0/100
Ingredient Quality	73.0/100	82.0/100 Best
Value for Money	92.0/100 Best	68.0/100
Side Effects	82.0/100 Best	80.0/100
Certifications	42.0/100 Best	38.0/100
Best Price	£14.71 iHerb →	£14.36 iHerb → Cheapest
Form	None	None
Dose	None	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	50	50

Vitamin K2 MK-7, 100 mcg, 240 Capsules

Pros

✓240-capsule bottle makes this one of the cheapest per-serving K2 MK-7 options — repeatedly highlighted by reviewers as the primary buying reason
✓MK-7 form has a long half-life (~72 hours), making once-daily dosing genuinely effective rather than a convenience compromise
✓Small softgels with no taste or aftertaste — multiple reviewers with swallowing difficulties specifically flag this
✓Minimal ingredient list: MK-7, sunflower oil, gelatin capsule — no unnecessary fillers beyond the caramel capsule colouring

Cons

✗Gelatin capsules — not suitable for vegans or vegetarians
✗Caramel colouring in the capsule shell uses ammonia-based processing; flagged by at least one reviewer with multiple chemical sensitivities
✗One reviewer notes the brand does not publish isomer data — unclear what percentage is all-trans MK-7 (the active form) versus cis
✗Rare reports of heart palpitations and anxiety, particularly when combined with high-dose vitamin D3

Best For

Anyone already taking vitamin D3 who needs K2 to ensure calcium is deposited in bones rather than soft tissue Budget-conscious buyers wanting a long-lasting single-ingredient K2 supplement People who struggle with large capsules — the softgels are notably small Those who prefer buying D3 and K2 separately to control individual doses

iHerb £14.71

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 Vitamin K2 MK-7, 100 m... vs Vitamins D and K with ...?

Vitamin K2 MK-7, 100 mcg, 240 Capsules Winner 76.0/100

At 100 mcg of MK-7 per softgel across 240 capsules, this is consistently cited as one of the best-value K2 options available — nearly every reviewer flags the price-per-serving as a key reason to buy.

Effectiveness

Vitamin K2 MK-7,..

78.0/100

Vitamins D and K..

77.0/100

Ingredient Quality

Vitamin K2 MK-7,..

73.0/100

Vitamins D and K..

82.0/100

Value for Money

Vitamin K2 MK-7,..

92.0/100

Vitamins D and K..

68.0/100

Side Effects

Vitamin K2 MK-7,..

82.0/100

Vitamins D and K..

80.0/100

Certifications

Vitamin K2 MK-7,..

42.0/100

Vitamins D and K..

38.0/100

What are the key differences?

Vitamin K2 MK-7, 100 mc.. is best for: Anyone already taking vitamin D3 who needs K2 to ensure calcium is deposited in bones rather than soft tissue, Budget-conscious buyers wanting a long-lasting single-ingredient K2 supplement

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, Vitamin K2 MK-7, 100 mcg, 240 Capsules or Vitamins D and K with Sea-Iodine, 60 Capsules? ▼

Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 76.0/100 overall while Vitamins D and K with Sea-Iodine, 60 Capsules scores 73.0/100. Vitamin K2 MK-7, 100 mcg, 240 Capsules comes out ahead, scoring higher on effectiveness (78.0 vs 77.0). Vitamin K2 MK-7, 100 mcg, 240 is best suited for Anyone already taking vitamin D3 who needs K2 to ensure calcium is deposited in bones rather than soft tissue and Budget-conscious buyers wanting a long-lasting single-ingredient K2 supplement. 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 Vitamin K2 MK-7, 100 mcg, 240 Capsules worth the price compared to Vitamins D and K with Sea-Iodine, 60 Capsules? ▼

Vitamin K2 MK-7, 100 mcg, 240 Capsules costs £14.71 while Vitamins D and K with Sea-Iodine, 60 Capsules is £14.36. For value, Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 92.0/100 vs Vitamins D and K with Sea-Iodine, 60 Capsules's 68.0/100. Vitamin K2 MK-7, 100 mcg, 240 Capsules delivers better value relative to its quality.

Which has fewer side effects? ▼

Vitamin K2 MK-7, 100 mcg, 240 Capsules scores 82.0/100 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 Vitamin K2 MK-7, 100 mcg, 240 Capsules. For certification and testing, Vitamin K2 MK-7, 100 scores 42.0/100 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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