Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml vs Vitamin D3, High Potency, 10,000 IU, 120 Softgels
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml and Vitamin D3, High Potency, 10,000 IU, 120 Softgels.
Last verified: 07 Apr 2026 · Based on 78 reviews
Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml scores 83.0/100 vs Vitamin D3, High Potency, 10,000 IU, 120 Softgels at 82.0/100. Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml wins on ingredient quality, side effects, certifications. Vitamin D3, High Potency, 10,000 IU, 120 Softgels is stronger on effectiveness and value for money.
Which is better: Nutri Advanced Vitamin D3 w... or Vitamin D3, High Potency, 1...?
NOW Foods wins on value and effectiveness: £8.82 versus £19.95, with an 86 score against Nutri Advanced's 75. Pick Nutri Advanced if you want K2 paired with D3, or need liquid drops for dose flexibility.
— AIScored Editorial Team
How Do the Scores Compare?
Nutri Advanced Vitamin D3 w...
Nutri Advanced
|
Vitamin D3, High Potency, 1...
NOW Foods
|
|
|---|---|---|
| Overall Score | 83.0 | 82.0 |
| Effectiveness | 75.0/100 |
86.0/100
Best
|
| Ingredient Quality |
93.0/100
Best
|
84.0/100 |
| Value for Money | 84.0/100 |
89.0/100
Best
|
| Side Effects |
91.0/100
Best
|
76.0/100 |
| Certifications |
88.0/100
Best
|
52.0/100 |
| Best Price | £19.95 Amazon UK → |
£8.82
iHerb →
Cheapest
|
| Price per Serving | £0.06 330 servings | N/A |
| Form | Liquid Drops | None |
| Dose | 1000 IU D3 + 45mcg K2 MK-7 per 3 drops | None |
| Third-Party Tested | ✓ Yes | ✗ No |
| Reviews Analysed | 28 | 50 |
Nutri Advanced Vitamin D3 with K...
Pros
- ✓Exemplary clean formulation: MCT oil carrier, natural orange flavour, and vitamin E stabiliser only — no fillers, bulking agents, or artificial additives
- ✓MK-7 form of K2 (longest half-life, best clinical evidence) paired with D3 for synergistic bone mineralisation and cardiovascular protection
- ✓Liquid drops allow precise, flexible dose adjustment — practical for those with confirmed deficiency needing higher therapeutic amounts
- ✓330 servings per bottle provides outstanding cost-per-serving for a practitioner-grade, third-party tested product
Cons
- ✗1000 IU D3 per 3-drop serving is a low baseline dose — those with confirmed deficiency will need multiple servings daily and should monitor blood levels
- ✗Not vegan: D3 is lanolin-derived from sheep's wool; liquid format may also require careful storage after opening
- ✗Contains coconut-derived MCT oil, which may be a concern for individuals with coconut sensitivity
- ✗Premium practitioner positioning means it is pricier per bottle than mainstream pharmacy alternatives despite similar active ingredients
Best For
Vitamin D3, High Potency, 10,000...
Pros
- ✓10,000 IU of D3 (cholecalciferol) — the superior form over D2, and genuinely useful for correcting significant deficiency quickly
- ✓Softgel in olive oil base supports fat-soluble absorption; reviewers consistently take it with fat-containing meals for best results
- ✓Multiple reviewers confirm measurable increases in blood vitamin D levels after a course of supplementation
- ✓Small capsules praised across dozens of reviews — easy to swallow, no taste or smell
Cons
- ✗No K2 included — a recurring complaint, as several reviewers specifically note they purchase K2 separately when using this high dose
- ✗Contains bovine gelatin; not suitable for vegans or vegetarians
- ✗No third-party testing; quality assurance relies entirely on NOW Foods' in-house GMP processes
- ✗10,000 IU requires blood level monitoring — several reviewers warn about the risk of overshooting if taken daily without testing
Best For
What does the data say about Nutri Advanced Vitamin... vs Vitamin D3, High Poten...?
Nutri Advanced's liquid drops and NOW Foods' softgels take completely different approaches. Nutri Advanced pairs 1000 IU of D3 with 45 micrograms of K2 MK-7 per 3-drop serving, letting you adjust doses — useful for confirmed deficiency. NOW Foods delivers 10,000 IU per softgel, roughly a 10-times higher dose that means one capsule every 2-3 days for most people. The ingredient quality scores tell the story: Nutri Advanced is 93 (clean MCT oil, natural flavouring, vitamin E only) but costs £19.95, while NOW Foods is 81 for ingredients and £8.82 for price, with reviewers reporting actual blood test improvements.
Choose Nutri Advanced if you struggle swallowing capsules or want K2 for bone and cardiovascular support. The MK-7 form has the longest half-life and strongest clinical evidence. Choose NOW Foods if you have confirmed deficiency and want a high-dose correction — reviewers specifically praised blood test improvements, not just feelings. The softgels are small and taste-free.
Nutri Advanced isn't vegan (lanolin-derived D3) and needs careful storage after opening. Several NOW Foods reviewers treat the lack of K2 as a gap, buying MK-7 separately to pair with it.
Nutri Advanced Vitamin D3 with K2 Liquid Drops is a practitioner-grade UK supplement combining cholecalciferol (D3) and menaquinone-7 (the preferred long-acting form of K2) in an MCT oil base — one of the cleanest supplement formulations on the UK market.
What are the key differences?
Frequently Asked Questions
Which is better, Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml or Vitamin D3, High Potency, 10,000 IU, 120 Softgels? ▼
Is Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml worth the price compared to Vitamin D3, High Potency, 10,000 IU, 120 Softgels? ▼
Which has fewer side effects? ▼
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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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