Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml vs Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml and Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count.
Last verified: 07 Apr 2026 · Based on 84 reviews
Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml scores 83.0/100 vs Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count at 83.0/100. Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml wins on ingredient quality, certifications. Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count is stronger on effectiveness and value for money.
Which is better: Nutri Advanced Vitamin D3 w... or Solgar Vitamin D3 1000 IU (...?
Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count wins for most people. It matches Nutri Advanced's 83.0/100 score but costs just £11.16 versus £19.95, with 250 easy-to-swallow softgels lasting eight months. Pick Nutri Advanced Vitamin D3 with K2 Liquid Drops if you hate capsules or want K2 for bone and heart support.
— AIScored Editorial Team
How Do the Scores Compare?
Nutri Advanced Vitamin D3 w...
Nutri Advanced
|
Solgar Vitamin D3 1000 IU (...
Solgar
|
|
|---|---|---|
| Overall Score | 83.0 | 83.0 |
| Effectiveness | 75.0/100 |
81.0/100
Best
|
| Ingredient Quality |
93.0/100
Best
|
89.0/100 |
| Value for Money | 84.0/100 |
86.0/100
Best
|
| Side Effects | 91.0/100 |
92.0/100
Best
|
| Certifications |
88.0/100
Best
|
68.0/100 |
| Best Price | £19.95 Amazon UK → |
£11.16
Amazon UK →
Cheapest
|
| Price per Serving | £0.06 330 servings |
£0.04
250 servings
Best value
|
| Form | Liquid Drops | Softgels |
| Dose | 1000 IU D3 + 45mcg K2 MK-7 per 3 drops | 1000 IU (25mcg) Vitamin D3 |
| Third-Party Tested | ✓ Yes | ✗ No |
| Reviews Analysed | 28 | 56 |
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
Solgar Vitamin D3 1000 IU (25mcg...
Pros
- ✓Small, easy-to-swallow softgels with no taste or odour — universally noted across reviews
- ✓Exceptionally clean formulation: only safflower oil and gelatin shell, no magnesium stearate or silicon dioxide
- ✓250-count bottle offers excellent long-term value — up to ~8 months supply at 1/day
- ✓Reviewers consistently report improved energy, mood, and immunity — consistent with D3 research evidence
Cons
- ✗1000 IU is a maintenance dose only — insufficient to correct deficiency; those with low D levels typically need 2000–5000 IU under guidance
- ✗Not third-party tested (e.g. NSF, Informed Sport) — limits verification for athletes or those requiring assay confirmation
- ✗Contains bovine gelatin — not suitable for vegans, vegetarians, or some religious dietary requirements (halal concerns raised by reviewers)
- ✗Safflower oil carrier is functional but not as optimal as olive oil or MCT oil for fat-soluble vitamin absorption
Best For
What does the data say about Nutri Advanced Vitamin... vs Solgar Vitamin D3 1000...?
Solgar Vitamin D3 1000 IU softgels deliver 25mcg of straight vitamin D3 in each tiny capsule while Nutri Advanced Vitamin D3 with K2 liquid drops give 1000 IU of D3 plus 45mcg of MK-7 K2 per three drops. The Solgar product uses a simple safflower oil and gelatin shell with no extra additives. Nutri Advanced mixes its vitamins into MCT oil with a touch of natural orange flavour and vitamin E. One bottle of Solgar lasts eight months at one softgel daily yet the Nutri Advanced 30ml bottle runs out faster if you need higher amounts.
Pick the Solgar option at £11.16 if you want easy daily maintenance and hate measuring drops. It scores 81/100 on effectiveness and 86/100 on value which beats the Nutri Advanced 75/100 effectiveness and 84/100 value despite both products tying at 83/100 overall. Go for the Nutri Advanced at £19.95 when you cannot swallow pills or need to adjust doses precisely for a deficiency. The added K2 makes it better for bone and heart support and its 93/100 ingredient quality edges out the Solgar 89/100.
The Solgar softgels have no taste or smell and slip down without fuss though the gelatin means they suit non-vegans only. Nutri Advanced drops taste mildly orangey but you must store the bottle carefully once opened and watch for any MCT oil reactions. Both work fine for people in gloomy UK winters yet check your blood levels before ramping up beyond the basic 1000 IU.
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 Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count? ▼
Is Nutri Advanced Vitamin D3 with K2 Liquid Drops 30ml worth the price compared to Solgar Vitamin D3 1000 IU (25mcg) Softgels - 250 Count? ▼
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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