Cheapest Vitamin D3 in the UK — price per 1,000 IU (September 2026)

We count the amount of cholecalciferol stated on the label, converting between units (for example micrograms and IU) so every product is on the same scale.

Vitamin D3 — Vitamin D3

Product	Pack	Per serving	Per 1,000 IU	Per month	Lasts	Buy
1 Vitamin D3 Softgels - Non-VeganMyvitamins · Myproteinships from — check delivery and duties	360 softgels · 360 servings	2,520 IU	£0.0127	£0.38	2.5 years	£11.49View at Myprotein
Show the working Servings: 360 ÷ 1 per serving = 360 In the pack: 360 × 2,520 IU = 907,200 IU £11.49 ÷ 907,200 IU × 1,000 IU = £0.0127 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “360Softgels” units per serving “Consume 1 softgel daily” amount per serving “Vitamin D ; 63μg ; 1260” Is this wrong? Tell us
2 Vitamin D3 TabletsBulkships from — check delivery and dutiesclaimed: vegetarian	270 tablets · 270 servings	4,000 IU	£0.0134	£0.40	3 years	£14.49View at Bulk
Show the working Servings: 270 ÷ 1 per serving = 270 In the pack: 270 × 4,000 IU = 1,080,000 IU £14.49 ÷ 1,080,000 IU × 1,000 IU = £0.0134 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “270 Tablets” units per serving “Per Serving (1 Tablet)” amount per serving “Vitamin D3 (Cholecalciferol) ; 100μg” Is this wrong? Tell us
3 Vitamin D3 TabletsBulkships from — check delivery and dutiesclaimed: vegetarian	90 tablets · 90 servings	4,000 IU	£0.0166	£0.50	12 months	£5.99View at Bulk
Show the working Servings: 90 ÷ 1 per serving = 90 In the pack: 90 × 4,000 IU = 360,000 IU £5.99 ÷ 360,000 IU × 1,000 IU = £0.0166 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “90 Tablets” units per serving “Per Serving (1 Tablet)” amount per serving “Vitamin D3 (Cholecalciferol) ; 100μg ; 2000” Is this wrong? Tell us
4 Vitamin D3 Softgels - Non-VeganMyvitamins · Myproteinships from — check delivery and duties	180 softgels · 180 servings	2,520 IU	£0.0176	£0.53	1.2 years	£7.99View at Myprotein
Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 2,520 IU = 453,600 IU £7.99 ÷ 453,600 IU × 1,000 IU = £0.0176 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “180Softgels” units per serving “Consume 1 softgel daily” amount per serving “63μg” Is this wrong? Tell us
5 Vitamin D3 50 Plus Vegan Friendly 180 CapsulesHealthspanships from — check delivery and dutiesclaimed: vegan	180 capsules · 180 servings	2,000 IU	£0.0278	£0.83	12 months	£9.99View at Healthspan
Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 2,000 IU = 360,000 IU £9.99 ÷ 360,000 IU × 1,000 IU = £0.0278 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “180 Capsules” units per serving “Swallow one capsule daily with water” amount per serving “Vitamin D3 (Vegan) ; 50 µg ; 1000% NRV” Is this wrong? Tell us
6 Vitamin D3 & K2 60 TabletsHealthspanalso contains vitamin k2ships from — check delivery and duties	60 tablets · 60 servings	4,000 IU	£0.0291	£0.87	8 months	£6.99View at Healthspan
Show the working Servings: 60 ÷ 1 per serving = 60 In the pack: 60 × 4,000 IU = 240,000 IU £6.99 ÷ 240,000 IU × 1,000 IU = £0.0291 per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. From the retailer's listing: pack units “60 Tablets” units per serving “Swallow 1 tablet daily with water” amount per serving “Vitamin D3 ; 100 µg ; 2000% NRV” Is this wrong? Tell us
7 Vitamin D 1000 I.U 25ug 120 TabletsHolland & Barrettships from — check delivery and duties	120 tablets · 120 servings	1,000 IU	£0.0306	£0.92	4 months	£3.67View at Holland & Barrett
Show the working Servings: 120 ÷ 1 per serving = 120 In the pack: 120 × 1,000 IU = 120,000 IU £3.67 ÷ 120,000 IU × 1,000 IU = £0.0306 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “120 Tablets” units per serving “Each 1 Tablet(s) Contains” amount per serving “Vitamin D3 ; 25µg (1000 I.U.) ; 500%” Is this wrong? Tell us
8 Vitamin D3 & K2 CapsulesMyvitamins · Myproteinalso contains vitamin k2ships from — check delivery and dutiesclaimed: vegetarian	90 capsules · 90 servings	4,000 IU	£0.0375	£1.12	12 months	£13.49View at Myprotein
Show the working Servings: 90 ÷ 1 per serving = 90 In the pack: 90 × 4,000 IU = 360,000 IU £13.49 ÷ 360,000 IU × 1,000 IU = £0.0375 per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. From the retailer's listing: pack units “90CAPSULES” servings stated “90servings” units per serving “Consume 1 capsule daily” amount per serving “Vitamin D3 ; 100.0μg ; 2000” Is this wrong? Tell us
9 Vitamin D3 & K2 CapsulesMyvitamins · Myproteinalso contains vitamin k2ships from — check delivery and dutiesclaimed: vegetarian	30 servings	4,000 IU	£0.0457	£1.37	4 months	£5.49View at Myprotein
Show the working Servings: 30 (as stated on the label) In the pack: 30 × 4,000 IU = 120,000 IU £5.49 ÷ 120,000 IU × 1,000 IU = £0.0457 per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. From the retailer's listing: units per serving “Consume 1 capsule daily” servings stated “30 Servings” amount per serving “Vitamin D3 ; 100.0μg ; 2000” Is this wrong? Tell us
10 Vitamin D3 4000iu 120 CapsulesHealthspan Elite · Healthspanships from — check delivery and duties	120 capsules · 120 servings	4,000 IU	£0.0521	£1.56	1.3 years	£24.99View at Healthspan
Show the working Servings: 120 ÷ 1 per serving = 120 In the pack: 120 × 4,000 IU = 480,000 IU £24.99 ÷ 480,000 IU × 1,000 IU = £0.0521 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “120 Capsules” units per serving “Swallow 1 capsule daily with water” servings stated “120 Capsules” amount per serving “Vitamin D3 ; 100 µg ; 2000% NRV \| equivalent to ; 4000 iu” Is this wrong? Tell us
11 Vitamin D3 50 Plus 180 CapsulesHealthspanships from — check delivery and duties	180 capsules · 180 servings	2,000 IU	£0.0527	£1.58	12 months	£18.99View at Healthspan
Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 2,000 IU = 360,000 IU £18.99 ÷ 360,000 IU × 1,000 IU = £0.0527 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “180 Capsules” units per serving “Swallow 1 capsule daily with water” amount per serving “Vitamin D3 ; 50 µg ; 1000% NRV” Is this wrong? Tell us
12 Super Strength Vitamin D3 240 TabletsHealthspanships from — check delivery and duties	240 tablets · 240 servings	1,000 IU	£0.0625	£1.87	8 months	£14.99View at Healthspan
Show the working Servings: 240 ÷ 1 per serving = 240 In the pack: 240 × 1,000 IU = 240,000 IU £14.99 ÷ 240,000 IU × 1,000 IU = £0.0625 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “240 Tablets” units per serving “Swallow 1 tablet daily with water” amount per serving “Vitamin D3 ; 25 µg ; 500% NRV” Is this wrong? Tell us
13 Vitamin D3 1000iu 120 TabletsHealthspan Elite · Healthspanships from — check delivery and duties	120 tablets · 120 servings	1,000 IU	£0.108	£3.25	4 months	£12.99View at Healthspan
Show the working Servings: 120 ÷ 1 per serving = 120 In the pack: 120 × 1,000 IU = 120,000 IU £12.99 ÷ 120,000 IU × 1,000 IU = £0.108 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “120 Tablets” units per serving “Swallow one tablet daily” amount per serving “Vitamin D3 ; 25mcg ; 500% NRV” Is this wrong? Tell us
14 Vitamin D3 10µg 240 TabletsHealthspanships from — check delivery and duties	240 tablets · 240 servings	400 IU	£0.125	£3.75	3 months	£11.99View at Healthspan
Show the working Servings: 240 ÷ 1 per serving = 240 In the pack: 240 × 400 IU = 96,000 IU £11.99 ÷ 96,000 IU × 1,000 IU = £0.125 per 1,000 IU Amount per serving: stated on the label. From the retailer's listing: pack units “240 Tablets” units per serving “Swallow one tablet daily with water” amount per serving “Vitamin D3 ; 10 µg ; 200% NRV” Is this wrong? Tell us
+ Magnesium Glycinate 3-in-1 Capsules \| 2398mgMyproteinCombination: price counts the vitamin d3 onlyalso contains magnesium, vitamin b6ships from — check delivery and duties	90 capsules · 30 servings	400 IU	£0.749	£22.47	12 days	£8.99View at Myprotein
Show the working Servings: 90 ÷ 3 per serving = 30 In the pack: 30 × 400 IU = 12,000 IU £8.99 ÷ 12,000 IU × 1,000 IU = £0.749 per 1,000 IU Amount per serving: stated on the label. Also contains: magnesium, vitamin b6. The price counts the vitamin d3 only. From the retailer's listing: pack units “90CAPSULES” units per serving “3 Capsules” servings stated “Servings Per Container: \| 30” amount per serving “Vitamin D3 ; 10µg (200%*)” Is this wrong? Tell us
+ Opti-Magnesium 90 TabletsHealthspanCombination: price counts the vitamin d3 onlyalso contains magnesium, vitamin b6 (pyridoxine 5 phosphate), inulinships from — check delivery and duties	90 tablets · 45 servings	200 IU	£1.78	£53.30	9 days	£15.99View at Healthspan
Show the working Servings: 90 ÷ 2 per serving = 45 In the pack: 45 × 200 IU = 9,000 IU £15.99 ÷ 9,000 IU × 1,000 IU = £1.78 per 1,000 IU Amount per serving: stated on the label. Also contains: magnesium, vitamin b6 (pyridoxine 5 phosphate), inulin. The price counts the vitamin d3 only. From the retailer's listing: units per serving “Swallow 2 tablets daily with water” pack units “90 Tablets” amount per serving “Vitamin D3 ; 2.5 µg ; 50% NRV” Is this wrong? Tell us

Questions

What does “per 1,000 IU” mean?

It is the unit we use to put every product on the same scale: the price of 1,000 IU of cholecalciferol, whatever the pack size or serving size. It is a comparison unit, not a recommendation of how much to take. Use the “Your daily dose” box to see costs at the amount you actually take.

Why are some products “unverified”?

If a retailer’s listing does not let us confirm the amount per serving, the pack size or the form, we do not guess. The product is shown separately with the reason, and never appears in the ranked table.

How up to date are the prices?

Prices on this page were last checked on 17 September 2026. Every table shows the date its prices were checked. Always confirm the price on the retailer’s site before buying.

Do retailers pay to appear higher?

No. We may earn a commission if you buy through our links, but the order is set only by price per dose. No retailer or brand can pay for position.

Also known as: vitamin d, vitamin d3, vit d, d3, cholecalciferol, colecalciferol.

Vitamin D3: price per 1,000 IU

Vitamin D3 — Vitamin D3

Questions