Best of
Best Vitamin D Supplement: Price per 10 µg Compared
Ad – we may earn a commission from links on this page. How we make money
We don't sell supplements; brands can't pay for placement; rankings use published testing and price per daily dose. How we rank
Independent of the brands we list: commission never changes a ranking. How we choose: form and dose, independent testing, ingredients and price per serving.
Affiliate disclosure: some links on this page are affiliate links. If you buy through them we may earn a commission at no extra cost to you. Commission never changes how we rank products. This is general information, not medical advice.
Your body needs vitamin D for healthy bones, teeth and muscles. In places like the UK, people don’t make enough from sunlight between October and early March, and the NHS advises everyone there to consider a daily supplement in those months. Beyond that basic need, big trials in generally healthy adults have mostly found no clear extra benefit, and we rate the evidence for healthy-aging goals C. This page compares three common products by strength and price. See the vitamin D guide for the evidence.
Short answer: Best budget (UK £): Holland & Barrett Vitamin D 10 µg (400 IU); Only priced US option: Thorne Vitamin D-1,000; Price not verified: NOW Vitamin D3 1000 IU. Prices, testing and every shop are in the picks below.
Quick picks
| Pick | Product | Best for | Price | Buy |
|---|---|---|---|---|
| Best budget (UK £) | Vitamin D 400 I.U. 10 µg, 240 tablets | UK readers who want a low-dose tablet at a very low price | £0.0233 per 10 µg (£5.59 ÷ 240 servings; checked Nov 1, 2026 at Holland & Barrett) | Holland & Barrett (affiliate link) |
| Only priced US option | Vitamin D-1,000, 90 capsules | Readers paying in dollars who want a 25 µg (1,000 IU) vitamin D3 capsule | $0.0756 per 10 µg ($17.00 ÷ 90 servings × 10 ÷ 25 µg; checked Nov 1, 2026 at Thorne) | Thorne (affiliate link) |
| Price not verified | Vitamin D3 1000 IU Softgels (180 or 360 count) | Readers who prefer a softgel and will check the price first | We could not confirm a price for this one, so no price per daily dose is shown. | NOW Foods (affiliate link) |
Our ranked picks
-
Best budget (UK £)
Vitamin D 400 I.U. 10 µg, 240 tablets
A 10 µg (400 IU) vitamin D tablet, 240 tablets in a pack, from the Holland & Barrett own brand.
Pros
- Lowest price per 10 µg on this page
- 10 µg (400 IU) per tablet, close to the amount UK health advice gives for autumn and winter
Cons
- No testing named in our data
- Our data does not say whether the tablet is vitamin D2 or D3
- One shop in our data
United Kingdom
-
Only priced US option
Vitamin D-1,000, 90 capsules
A 25 µg (1,000 IU) vitamin D3 capsule, 90 capsules.
Pros
- Vitamin D3 stated
- 25 µg per capsule, well below the 100 µg (4,000 IU) upper limit
Cons
- No testing named in our data
- Higher price per 10 µg than the UK tablet
United States
-
Price not verified
Vitamin D3 1000 IU Softgels (180 or 360 count)
A 25 µg (1,000 IU) vitamin D3 softgel, 180 or 360 count. The page states Intertek GMP certification, which is a manufacturing certification, not a product-specific potency test.
Pros
- Vitamin D3 stated
Cons
- Price not listed here; check the shop
- No product-specific testing named in our data
United States
How we rank
We only rank products that are in our product data file, and we use only what that file records:
- Form and amount. We compare the vitamin D per serving in micrograms (and IU) and check that the strength is close to ordinary daily amounts, not very high.
- Third-party testing, as listed. We note a named testing program (for example NSF Certified for Sport) when our data lists one. Where the data says “brand statement”, we say so and do not count it as verified by us.
- Price per daily dose. We divide the pack price by the servings per pack, then scale to our basis: 10 µg (400 IU) of vitamin D a day. It is a price basis so tablets and capsules of different strengths can be compared, not a recommended dose. Prices in different currencies are not converted, so $ and £ are only compared within their own currency.
Winner labels. “Best overall” goes to the cheapest product with a named testing program in that currency. “Best budget” goes to the lowest price per daily dose in that currency, whatever the testing. “Best tested” is only used when one product lists clearly more named programs than the rest. If no product qualifies for a label, we leave that label out.
No certificates. None of the three products has a product-specific testing certificate in our data, so no product qualifies for Best overall or Best tested. Only Best budget (UK £) is awarded.
What we did not do. We have not tested these products ourselves, in a lab or by taking them. We did not rank by commission. Prices change, so each price shows the date it was checked. More in How we rank.
Price per daily dose
Basis: 10 µg (400 IU) of vitamin D a day. It is a price basis so tablets and capsules of different strengths can be compared, not a recommended dose. Every number below is worked out from the pack price, servings per pack and amount per serving in our product data.
US dollar prices ($)
| Product (retailer) | Amount per serving | Pack price (checked) | Price per serving | Price per daily dose | Testing named in our data |
|---|---|---|---|---|---|
| Thorne Vitamin D-1,000, 90 capsules (Thorne) | 25 µg (1,000 IU) vitamin D3 | $17.00 (Nov 1, 2026) | $17.00 ÷ 90 = $0.1889 | $0.1889 × 10 ÷ 25 = $0.0756 | None named |
UK prices (£)
| Product (retailer) | Amount per serving | Pack price (checked) | Price per serving | Price per daily dose | Testing named in our data |
|---|---|---|---|---|---|
| Holland & Barrett Vitamin D 400 I.U. 10 µg, 240 tablets (Holland & Barrett) | 10 µg (400 IU) vitamin D | £5.59 (Nov 1, 2026) | £5.59 ÷ 240 = £0.0233 | £0.0233 | None named |
Thorne: $17 ÷ 90 = $0.189 per 25 µg capsule; × 10 ÷ 25 = $0.0756 per 10 µg. Strengths differ, so the price per 10 µg is the like-for-like number.
How to start
Official guidance varies by country: US guidance sets 15 µg (600 IU) a day for most adults, and the NHS and NIH both set an upper limit of 100 µg (4,000 IU) a day for adults. All three products are 10 to 25 µg per serving. If you think your level is low, ask a doctor or pharmacist about a blood test before you pick a strength. See the vitamin D guide for amounts and safety notes.
Talk to your doctor or pharmacist
Talk to your doctor or pharmacist before you start any supplement, especially if you are pregnant or breastfeeding, take prescription medicine, or have a health condition. Limits for babies and children are lower, so ask before giving a supplement to a child. The full guide has the evidence, safety notes and citations.
How we chose
We compared three vitamin D products by µg per serving, named third-party testing and price per 10 µg. We have not tested any product ourselves, and commission does not affect the order.
FAQ
What is the best vitamin D supplement?
On price per 10 µg, Holland & Barrett’s 10 µg tablet is the cheapest in pounds. In dollars, Thorne is the only product with a verified price. None lists a product-specific testing certificate in our data.
Do I need vitamin D in summer?
The NHS says people in the UK don’t make enough from sunlight between October and early March, so it advises considering a daily supplement in those months. Ask a doctor or pharmacist about your own situation, especially if you spend little time outdoors.
Does vitamin D help healthy adults?
Big trials in generally healthy adults mostly found no clear extra benefit for heart disease, cancer or broken bones. It is worthwhile if your level is low. See the guide.
Should I choose D2 or D3?
Our products are mostly D3. See vitamin D2 vs D3 when that comparison is published.
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Medical disclaimer