Vitamin D-3, High Potency, 5,000 IU, 120 Softgels vs Vitamin D-3, High Potency, 5,000 IU, 240 Softgels
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Vitamin D-3, High Potency, 5,000 IU, 120 Softgels and Vitamin D-3, High Potency, 5,000 IU, 240 Softgels.
Last verified: 07 Apr 2026 · Based on 100 reviews
Vitamin D-3, High Potency, 5,000 IU, 120 Softgels scores 82.0/100 vs Vitamin D-3, High Potency, 5,000 IU, 240 Softgels at 82.0/100. Vitamin D-3, High Potency, 5,000 IU, 120 Softgels wins on effectiveness, certifications. Vitamin D-3, High Potency, 5,000 IU, 240 Softgels is stronger on value for money.
Which is better: Vitamin D-3, High Potency, ... or Vitamin D-3, High Potency, ...?
The 240-softgel pack wins on value (93 vs 91), stretching to 8+ months per bottle at £11.93 — roughly the same per-dose cost as buying two 120-packs. Choose the 120-softgel option only if you want a smaller upfront spend to trial the supplement before committing.
— AIScored Editorial Team
How Do the Scores Compare?
Vitamin D-3, High Potency, ...
NOW Foods
|
Vitamin D-3, High Potency, ...
NOW Foods
|
|
|---|---|---|
| Overall Score | 82.0 | 82.0 |
| Effectiveness |
86.0/100
Best
|
85.0/100 |
| Ingredient Quality |
83.0/100
Best
|
83.0/100
Best
|
| Value for Money | 90.0/100 |
91.0/100
Best
|
| Side Effects |
87.0/100
Best
|
87.0/100
Best
|
| Certifications |
58.0/100
Best
|
52.0/100 |
| Best Price |
£6.74
iHerb →
Cheapest
|
£11.93 iHerb → |
| Form | None | None |
| Dose | None | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 50 | 50 |
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
Vitamin D-3, High Potency, 5,000...
Pros
- ✓Cholecalciferol (D3) in olive oil — correct form and fat-soluble delivery for meaningful absorption
- ✓240 softgels at 5,000 IU is exceptional value; multiple reviewers explicitly note how long a single purchase lasts
- ✓Tiny, tasteless, odourless softgels — easy to swallow, praised consistently across dozens of reviews
- ✓Several reviewers confirm blood levels normalised after taking this at a doctor-recommended 5,000 IU dose
Cons
- ✗Not vegan — bovine gelatin capsule shell rules it out for plant-based users
- ✗No independent third-party purity or potency testing (no NSF, USP, or equivalent verification)
- ✗5,000 IU is a therapeutic dose, not a maintenance dose — appropriate only with confirmed deficiency and blood monitoring
- ✗No K2 included; several reviewers specifically flag that K2 should be taken separately to direct calcium properly
Best For
What does the data say about Vitamin D-3, High Pote... vs Vitamin D-3, High Pote...?
These are the same product in two different pack sizes. Both contain cholecalciferol at 5,000 IU per softgel, both use olive oil as the fat-soluble delivery base, and both score identically on ingredient quality at 83/100 and overall at 82/100. The only meaningful differences are quantity and price: 120 softgels for £6.74 versus 240 softgels for £11.93. At those prices, the larger pack works out cheaper per softgel, which is reflected in the value scores — 91/100 for the 240-count versus 90/100 for the 120-count.
If you have a confirmed deficiency and know you'll be taking 5,000 IU daily for the foreseeable future, the 240-softgel pack is the straightforward choice. Multiple reviewers note how long a single purchase lasts, and the per-unit saving is real. The 120-softgel pack suits someone trying this dose for the first time, perhaps on a doctor's recommendation, who wants to commit less money upfront before deciding whether to continue. Both are equally appropriate for people in low-sunlight regions needing year-round supplementation.
On practicalities, both versions share the same softgel design — small, tasteless, odourless, and consistently praised across reviews as easy to swallow and gentle on the stomach. Neither is suitable for vegans or vegetarians, as both use a bovine gelatin capsule shell.
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.
What are the key differences?
Frequently Asked Questions
Which is better, Vitamin D-3, High Potency, 5,000 IU, 120 Softgels or Vitamin D-3, High Potency, 5,000 IU, 240 Softgels? ▼
Is Vitamin D-3, High Potency, 5,000 IU, 120 Softgels worth the price compared to Vitamin D-3, High Potency, 5,000 IU, 240 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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