Vitamin D-3, High Potency, 5,000 IU, 120 Softgels vs Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2

Q: Why do 97% of UK vitamin D supplements lack third-party certification?

Of 35 vitamin D products in our database, only 1 carries third-party certification. That means 97% of the vitamin D supplements sold in the UK have no independent verification of what's actually in the bottle. UK regulations don't require third-party testing for supplements, so most brands skip it to save money. If certification matters to you, NOW Foods and Thorne are the brands scoring highest in our rankings, with overall scores of 85-87/100.

Q: Do you need vitamin K2 with high-dose vitamin D?

Our data shows that Thorne Vitamin D + K2 Liquid is the only combination D3+K2 product scoring 87/100 in our database of 35 vitamin D supplements, tying with two NOW Foods D3-only products for the top spot. Clinical research suggests K2 helps direct calcium to bones rather than arteries, which may matter at doses above 4000 IU daily. If you already eat K2-rich foods like natto, hard cheese, or egg yolks, a standalone D3 product may be sufficient.

Side-by-side comparison of scores, ingredients, prices and real customer feedback for Vitamin D-3, High Potency, 5,000 IU, 120 Softgels and Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2.

Last verified: 07 Apr 2026 · Based on 75 reviews

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82.0

Quick Answer

Vitamin D-3, High Potency, 5,000 IU, 120 Softgels scores 82.0/100 vs Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 at 81.0/100. Vitamin D-3, High Potency, 5,000 IU, 120 Softgels wins on effectiveness, certifications. Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 is stronger on ingredient quality and value for money.

How Do the Scores Compare?

Vitamin D-3, High Potency, ...

Vegavero Vitamin D3 7000 IU...

	Vitamin D-3, High Potency, ... NOW Foods	Vegavero Vitamin D3 7000 IU... Vegavero
Overall Score	82.0	81.0
Effectiveness	86.0/100 Best	82.0/100
Ingredient Quality	83.0/100	88.0/100 Best
Value for Money	90.0/100	91.0/100 Best
Side Effects	87.0/100	89.0/100 Best
Certifications	58.0/100 Best	55.0/100
Best Price	£6.74 iHerb → Cheapest	£22.95 Amazon UK →
Form	None	‎Tablet
Dose	None	None
Third-Party Tested	✗ No	✗ No
Reviews Analysed	50	25

Vitamin D-3, High Potency, 5,000...

Pros

✓D3 (cholecalciferol) in an olive oil and safflower oil base — the most bioavailable form, in the most appropriate delivery medium for a fat-soluble vitamin
✓Multiple reviewers confirmed blood test levels returning to normal after consistent use, including doctor-prescribed cases of significant deficiency
✓Small softgels praised consistently as easy to swallow, tasteless, and gentle on the stomach
✓5,000 IU therapeutic dose in a single capsule — practical for deficiency correction without splitting doses

Cons

✗Not third-party tested — no independent lab has verified potency or purity; specs confirm this
✗Not vegan or vegetarian: bovine gelatin capsule
✗5,000 IU exceeds standard maintenance levels and is not appropriate for unsupervised long-term use without periodic blood monitoring
✗Does not include K2, which several reviewers note is needed for proper calcium routing — requires a separate purchase

Best For

Adults with confirmed vitamin D deficiency, especially those prescribed 5,000 IU by a doctor People in low-sunlight climates or spending most of the year indoors Budget-conscious buyers wanting a clean single-ingredient D3 without unnecessary additives Those who already take a separate K2 supplement and want a standalone high-dose D3

iHerb £6.74

View full review →

Vegavero Vitamin D3 7000 IU + 20...

Pros

✓Once-weekly dosing is highly convenient and reduces the risk of daily non-compliance
✓All-trans MK-7 vitamin K2 — the most bioavailable and bioactive K2 form — helps direct calcium into bones and away from arteries
✓Vegan D3 sourced from pine resin (EirVit), rare premium alternative to lanolin-derived D3
✓~2 year supply per bottle offers strong cost efficiency and reduces reorder frequency

Cons

✗7000 IU weekly requires understanding of dosing — not suitable for unsupervised use in people with hypercalcemia or kidney disease
✗Weekly schedule is easy to forget, especially for users already taking daily supplements
✗Tablet size noted as large by some reviewers
✗No independent third-party certification (e.g. NSF, Informed Sport) despite in-house lab testing

Best For

UK residents with limited sun exposure, especially in winter Vegans seeking lanolin-free vitamin D3 People who struggle with daily supplement routines Those focused on bone health, calcium metabolism, and immune support Cost-conscious buyers wanting a long-lasting supply

Amazon UK £22.95

View full review →

What does the data say about Vitamin D-3, High Pote... vs Vegavero Vitamin D3 70...?

Vitamin D-3, High Potency, 5,000 IU, 120 Softgels Winner 82.0/100

5,000 IU of cholecalciferol per softgel puts this firmly in therapeutic territory — a dose multiple reviewers had validated by blood tests showing deficiency fully corrected.

Effectiveness

Vitamin D-3, Hig..

86.0/100

Vegavero Vitamin..

82.0/100

Ingredient Quality

Vitamin D-3, Hig..

83.0/100

Vegavero Vitamin..

88.0/100

Value for Money

Vitamin D-3, Hig..

90.0/100

Vegavero Vitamin..

91.0/100

Side Effects

Vitamin D-3, Hig..

87.0/100

Vegavero Vitamin..

89.0/100

Certifications

Vitamin D-3, Hig..

58.0/100

Vegavero Vitamin..

55.0/100

What are the key differences?

Vitamin D-3, High Poten.. is best for: Adults with confirmed vitamin D deficiency, especially those prescribed 5,000 IU by a doctor, People in low-sunlight climates or spending most of the year indoors

Vegavero Vitamin D3 700.. is best for: UK residents with limited sun exposure, especially in winter, Vegans seeking lanolin-free vitamin D3

Frequently Asked Questions

Which is better, Vitamin D-3, High Potency, 5,000 IU, 120 Softgels or Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2? ▼

Vitamin D-3, High Potency, 5,000 IU, 120 Softgels scores 82.0/100 overall while Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 scores 81.0/100. Vitamin D-3, High Potency, 5,000 IU, 120 Softgels comes out ahead, scoring higher on effectiveness (86.0 vs 82.0). Vitamin D-3, High Potency, 5,0 is best suited for Adults with confirmed vitamin D deficiency, especially those prescribed 5,000 IU by a doctor and People in low-sunlight climates or spending most of the year indoors. Vegavero Vitamin D3 7000 IU + is better for UK residents with limited sun exposure, especially in winter and Vegans seeking lanolin-free vitamin D3.

Is Vitamin D-3, High Potency, 5,000 IU, 120 Softgels worth the price compared to Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2? ▼

Vitamin D-3, High Potency, 5,000 IU, 120 Softgels costs £6.74 while Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 is £22.95. For value, Vitamin D-3, High Potency, 5,000 IU, 120 Softgels scores 90.0/100 vs Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2's 91.0/100. Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 delivers better value relative to its quality.

Which has fewer side effects? ▼

Vitamin D-3, High Potency, 5,000 IU, 120 Softgels scores 87.0/100 for side effects (higher means fewer reported issues) while Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2 scores 89.0/100. Reviewers report fewer side effects with Vegavero Vitamin D3 7000 IU + 200 µg Vitamin K2. For certification and testing, Vitamin D-3, High Po scores 58.0/100 vs Vegavero Vitamin D3 's 55.0/100. Always consult a healthcare professional before starting any supplement.

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What the Data Says

Why do 97% of UK vitamin D supplements lack third-party certification?

Only 1 out of 35 vitamin D products we scored has independent certification. That's 97% without any third-party verification of purity, potency, or label accuracy.

This is worse than most supplement categories. The reason is simple: UK law doesn't require it, and testing costs money. Most vitamin D brands sell on price alone, especially in the D3-only space where the raw ingredient is cheap. Certification adds cost that budget brands won't absorb.

What does this mean for you? Without third-party testing, you're trusting the manufacturer's label claims. A 2021 study in Nutrients found that vitamin D supplements varied from 52% to 135% of their labelled dose. That's a problem if you're relying on a specific daily intake.

Among the 35 products we scored, the top performers are all from brands with strong manufacturing track records: NOW Foods D3 5000 IU and Thorne Vitamin D + K2 both score 87/100 overall. Thorne holds the highest certification score in the category at 85/100. If independent testing matters to you, that's the product to look at.

Do you need vitamin K2 with high-dose vitamin D?

Probably yes at high doses, and our data backs the pairing. Thorne Vitamin D + K2 Liquid is the only D3+K2 combo product in our 35-product database that scores 87/100 overall, matching the top-ranked D3-only options from NOW Foods. It also holds the highest certification score in the category at 85/100.

Here's the science behind it. Vitamin D increases calcium absorption from food. Vitamin K2 activates proteins that direct that calcium into bones and teeth, keeping it out of your arteries and soft tissue. At standard doses (1000-2000 IU daily), most people get enough K2 from diet to handle the extra calcium. At 4000-5000 IU daily, the calcium load increases enough that K2 becomes a more serious consideration.

The Endocrine Society doesn't yet include K2 in its vitamin D guidelines. But a growing body of research, including a 2019 meta-analysis in International Journal of Molecular Sciences, shows the D3+K2 combination improves bone mineral density more than D3 alone.

If you eat K2-rich foods regularly (natto, hard cheese, egg yolks, chicken liver), a standalone D3 product like NOW Foods D3 5000 IU 360 Softgels (87/100) is a solid choice. If your diet is low in K2, or you're taking 4000+ IU of D3 daily, Thorne D + K2 covers both bases in one product.

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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