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Vitamin D3

Also called vitamin D, vit D, D3 and 2 more

cholecalciferol, colecalciferol.

Cheapest vitamin D3: 1p per 1,000 IU at WeightWorld, of 197 products at 20 shops. Price checked 22 October 2026.

The best price per 1,000 IU and per month, form by form, across 20 UK retailers, and where to buy it cheapest. A unit for comparing, not advice.

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Comparing vitamin D3

We count the cholecalciferol a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Vitamin D3 comes as vitamin D3 and vitamin D2, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. A product with one other ingredient is ranked here with an “also contains” note; products that combine vitamin D3 with several others are listed separately, because their price buys more than cholecalciferol. 1,000 IU is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Vitamin D3

Most prices last checked: 29 October 2026; an older price shows its own date. Ranked purely by price per 1,000 IU — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

6 of the 10 cheapest links on this page earn us nothing; the order is price alone. Shop by shop

Made for children (49): what a day costs at the label's serving →

10 µg = 400 IU; 25 µg = 1,000 IU. IU and µg converter

Vitamin D3: products ranked by price per 1,000 IU
Rank	Product	Per 1,000 IU	Per month	Lasts	Buy	How it is worked out
1	Cheapest per doseHigh-Strength Vitamin D3 TabletsWeightWorld · 400 servings · 4,000 IU a servingDetails and price history Add to my stackD3 from lanolin, the listing says	1p	17p	4.4 years	£8.99View at WeightWorld (opens in a new tab)Price checked 22 OctoberFree delivery over £35.00, otherwise £1.99 · 2–3 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 400 (as stated on the label) In the pack: 400 × 4,000 IU = 1,600,000 IU £8.99 ÷ 1,600,000 IU × 1,000 IU = 0.562p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says servings stated “Servings per Container: 400” units per serving “Take 1 tablet daily” amount per serving “Vitamin D3 (Source : Lanolin) ; 4000 IU” Is this wrong? Tell us
2	Vitamin D3 4000iu - 365. 1 year supply. / Zip-Lock Eco BagZipVit · 365 tablets · 365 servings · 4,000 IU a servingDetails and price history Add to my stack	1p	17p	4 years	£8.49View at ZipVit (opens in a new tab)Price checked 22 OctoberFree UK delivery · 2–4 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 365 ÷ 1 per serving = 365 In the pack: 365 × 4,000 IU = 1,460,000 IU £8.49 ÷ 1,460,000 IU × 1,000 IU = 0.582p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “4000iu - 365” units per serving “Take 1 tablet daily” amount per serving “Vitamin D3 ; 4000iu ; 2000%” Is this wrong? Tell us
3	Vitamin D3 + K2 (MK7) TabletsWeightWorld · 365 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2D3 from lanolin, the listing says	1p	21p	4 years	£9.99View at WeightWorld (opens in a new tab)Price checked 22 OctoberFree delivery over £35.00, otherwise £1.99 · 2–3 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 365 (as stated on the label) In the pack: 365 × 4,000 IU = 1,460,000 IU £9.99 ÷ 1,460,000 IU × 1,000 IU = 0.684p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says servings stated “Servings per Container: 365” units per serving “Serving Size: 1 Tablet” amount per serving “Vitamin D3 (Source : Lanolin) ; 4000 IU” Is this wrong? Tell us
4	Vitamin D3 & K2 - 365. 1 year supply. / Zip-Lock Eco BagZipVit · 365 tablets · 365 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2	1p	21p	4 years	£9.99View at ZipVit (opens in a new tab)Price checked 22 OctoberFree UK delivery · 2–4 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 365 ÷ 1 per serving = 365 In the pack: 365 × 4,000 IU = 1,460,000 IU £9.99 ÷ 1,460,000 IU × 1,000 IU = 0.684p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says pack units “- 365. 1 year supply.” units per serving “Take 1 tablet daily” amount per serving “Vitamin D3 ; 4000iu” Is this wrong? Tell us
5	Vitamin D3 4000iu Softgels - 365. 1 year supply. / Zip-Lock Eco BagZipVit · 365 softgels · 365 servings · 4,000 IU a servingDetails and price history Add to my stack	1p	29p	4 years	£13.99View at ZipVit (opens in a new tab)Price checked 22 OctoberFree UK delivery · 2–4 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 365 ÷ 1 per serving = 365 In the pack: 365 × 4,000 IU = 1,460,000 IU £13.99 ÷ 1,460,000 IU × 1,000 IU = 0.958p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “Softgels - 365” units per serving “Take 1 capsule daily” amount per serving “Vitamin D3 ; 4000iu” Is this wrong? Tell us
6	Vitamin D3 4000iu & Vitamin K2 100mcg360 tablets · 360 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2Testing claimed on label	1p	29p	3.9 years	£13.99View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99 · 2–3 working days after dispatch AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 360 ÷ 1 per serving = 360 In the pack: 360 × 4,000 IU = 1,440,000 IU £13.99 ÷ 1,440,000 IU × 1,000 IU = 0.972p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says testing claim “manufacturing according to GMP standards” units per serving “Just one small, easy-to-swallow tablet per day” amount per serving “Vitamin D3 4000iu” confirmed values “confirmed from the retailer's own product page, not this listing's text: pack units 360; pack unit type tablet; units per serving 1.0” Is this wrong? Tell us
7	Vitamin D3 Tablets 4,000iu360 tablets · 360 servings · 4,000 IU a servingDetails and price history Add to my stackTesting claimed on label	1p	29p	3.9 years	£13.99View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99 · 2–3 working days after dispatch AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 360 ÷ 1 per serving = 360 In the pack: 360 × 4,000 IU = 1,440,000 IU £13.99 ÷ 1,440,000 IU × 1,000 IU = 0.972p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says testing claim “Good Manufacturing Practice (GMP)” units per serving “One-a-day formula” amount per serving “our tablets provide 4,000iu of Vitamin D3” confirmed values “confirmed from the retailer's own product page, not this listing's text: pack units 360; pack unit type tablet; units per serving 1.0” Is this wrong? Tell us
8	Vitamin D-3 5,000 IU · 240 softgels · 240 servings · 5,000 IU a servingDetails and price history Add to my stackD3 from lanolin, the listing saysgelatine capsule, the listing says	1p	30p	3.3 years	£11.81View at Healf (opens in a new tab)Free UK delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 240 ÷ 1 per serving = 240 In the pack: 240 × 5,000 IU = 1,200,000 IU £11.81 ÷ 1,200,000 IU × 1,000 IU = 0.984p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “240 caps” units per serving “Serving Size: 1 Softgel” amount per serving “(From Lanolin) (5,000 IU) ; 125 mcg” Is this wrong? Tell us
9	Vitamin D3 Softgels - Non-Vegan · 360 softgels · 360 servings · 2,520 IU a servingDetails and price history Add to my stackgelatine capsule, the listing says	1p	33p	2.5 years	£9.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 · 2–3 working days AmazonBuy a different pack size on Amazon (opens in a new tab)	Show the working Servings: 360 ÷ 1 per serving = 360 In the pack: 360 × 2,520 IU = 907,200 IU £9.99 ÷ 907,200 IU × 1,000 IU = 1.1p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “360Softgels” units per serving “Consume 1 softgel daily” amount per serving “Vitamin D ; 63μg ; 1260” Is this wrong? Tell us
10	Vitamin D3 + K2 540 Brand NewProtein Works · 540 tablets · 540 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2	1p	33p	5.9 years	£23.99View at Protein Works (opens in a new tab)Price checked 22 OctoberFree delivery from £70.00, otherwise £4.49 · 3–5 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 540 ÷ 1 per serving = 540 In the pack: 540 × 4,000 IU = 2,160,000 IU £23.99 ÷ 2,160,000 IU × 1,000 IU = 1.11p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says units per serving “Per 1 Tablet” amount per serving “[Vitamin D3 ; 100µg ; 2000%]” confirmed values “confirmed from the retailer's own product page, not this listing's text: form id d3; amount per serving 100.0; amount unit mcg; amount refers to elemental; units per serving 1.0; pack units 540; pack unit type tablet” Is this wrong? Tell us
11	Vitamin D3 4000IU - 425 High Strength Softgels Immune System Bone Muscle SupportVitaBright · 425 softgels · 425 servings · 4,000 IU a servingDetails and price history Add to my stack	1p	35p	4.7 years	£19.99View at VitaBright (opens in a new tab)Price checked 22 OctoberFree UK delivery over £30.00, otherwise £2.95 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 425 ÷ 1 per serving = 425 In the pack: 425 × 4,000 IU = 1,700,000 IU £19.99 ÷ 1,700,000 IU × 1,000 IU = 1.18p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “425 High Strength Softgels” servings stated “Servings Per Container: 425” units per serving “Serving Size: 1 Softgel” amount per serving “Vitamin D3 Cholecalciferol ; 4000 IU” Is this wrong? Tell us
12	Vitamin D3 TabletsVitaBright · 425 servings · 4,000 IU a servingDetails and price history Add to my stackgelatine capsule, the listing says	1p	35p	4.7 years	£19.99View at VitaBright (opens in a new tab)Price checked 22 OctoberFree UK delivery over £30.00, otherwise £2.95 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 425 (as stated on the label) In the pack: 425 × 4,000 IU = 1,700,000 IU £19.99 ÷ 1,700,000 IU × 1,000 IU = 1.18p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says servings stated “Servings Per Container: 425” units per serving “Serving Size: 1 Softgel” amount per serving “Vitamin D3 Cholecalciferol ; 4000 IU” Is this wrong? Tell us
13	Vitamin D3 + K2 360 Brand NewProtein Works · 360 tablets · 360 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2	1p	37p	3.9 years	£17.99View at Protein Works (opens in a new tab)Price checked 22 OctoberFree delivery from £70.00, otherwise £4.49 · 3–5 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 360 ÷ 1 per serving = 360 In the pack: 360 × 4,000 IU = 1,440,000 IU £17.99 ÷ 1,440,000 IU × 1,000 IU = 1.25p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says units per serving “Per 1 Tablet” amount per serving “[Vitamin D3 ; 100µg ; 2000%]” confirmed values “confirmed from the retailer's own product page, not this listing's text: form id d3; amount per serving 100.0; amount unit mcg; amount refers to elemental; units per serving 1.0; pack units 360; pack unit type tablet” Is this wrong? Tell us
14	Vitamin D3 50ug (2000IU) Cholecalciferol 1 Year's Supply 365 Tablets4 HIM & HER · Lloyds Pharmacy · 365 tablets · 365 servings · 2,000 IU a servingDetails and price history Add to my stack	1p	40p	2 years	£9.76View at Lloyds Pharmacy (opens in a new tab)Price checked 22 OctoberFree delivery over £30.00, otherwise £2.99 · 2–3 working days from dispatch AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 365 ÷ 1 per serving = 365 In the pack: 365 × 2,000 IU = 730,000 IU £9.76 ÷ 730,000 IU × 1,000 IU = 1.34p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “365 Tablets” units per serving “Take 1 tablet per day” amount per serving “Vitamin D3 50ug (2000IU)” Is this wrong? Tell us
15	Vitamin D3 Tablets270 tablets · 270 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains calciumclaimed: vegetarian	1p	40p	3 years	£14.49View at Bulk (opens in a new tab)Free delivery over £49.00, otherwise £3.95 · 2–3 days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	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 = 1.34p per 1,000 IU Amount per serving: stated on the label. Also contains: calcium. The price counts the vitamin d3 only. What the retailer's listing says pack units “270 Tablets” units per serving “Per Serving (1 Tablet)” amount per serving “Vitamin D3 (Cholecalciferol) ; 100μg ; 2000” Is this wrong? Tell us
16	Nature's AnswerVitamin D3 Drops · 15 ml · 250 servings · 4,000 IU a servingDetails and price history Add to my stack	1p	40p	2.7 years	£13.49View at Healf (opens in a new tab)Free UK delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 15 ÷ 0.06 per serving = 250 In the pack: 250 × 4,000 IU = 1,000,000 IU £13.49 ÷ 1,000,000 IU × 1,000 IU = 1.35p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “15ml” servings stated “Servings Per Container: 240” units per serving “Take two drops (0.06ml) per day” amount per serving “Vitamin D3 (as Cholecalciferol)** ; 100 mcg” Is this wrong? Tell us
17	Vitamin D3 + K2 180 Brand NewProtein Works · 180 tablets · 180 servings · 4,000 IU a servingDetails and price history Add to my stackalso contains vitamin k2	1p	42p	2 years	£9.99View at Protein Works (opens in a new tab)Price checked 22 OctoberFree delivery from £70.00, otherwise £4.49 · 3–5 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 4,000 IU = 720,000 IU £9.99 ÷ 720,000 IU × 1,000 IU = 1.39p per 1,000 IU Amount per serving: stated on the label. Also contains: vitamin k2. The price counts the vitamin d3 only. What the retailer's listing says units per serving “Per 1 Tablet” amount per serving “[Vitamin D3 ; 100µg ; 2000%]” confirmed values “confirmed from the retailer's own product page, not this listing's text: form id d3; amount per serving 100.0; amount unit mcg; amount refers to elemental; units per serving 1.0; pack units 180; pack unit type tablet” Is this wrong? Tell us
18	Vitamin D3 4000iu SoftgelsZipVit · 180 softgels · 180 servings · 4,000 IU a servingDetails and price history Add to my stack	1p	42p	2 years	£9.99View at ZipVit (opens in a new tab)Price checked 22 OctoberFree UK delivery · 2–4 working days AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 4,000 IU = 720,000 IU £9.99 ÷ 720,000 IU × 1,000 IU = 1.39p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “Softgels - 180” units per serving “Take 1 capsule daily” amount per serving “Vitamin D3 ; 4000iu” Is this wrong? Tell us
19	Vitamin D-3 5,000 IU · 120 softgels · 120 servings · 5,000 IU a servingDetails and price history Add to my stackD3 from lanolin, the listing saysgelatine capsule, the listing says	1p	42p	1.6 years	£8.49View at Healf (opens in a new tab)Free UK delivery over £50.00, otherwise £3.99 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 120 ÷ 1 per serving = 120 In the pack: 120 × 5,000 IU = 600,000 IU £8.49 ÷ 600,000 IU × 1,000 IU = 1.42p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “120 caps” servings stated “Servings Per Container: 120” units per serving “Serving Size: 1 Softgel” amount per serving “(From Lanolin) (5,000 IU) ; 125 mcg” Is this wrong? Tell us
20	Vitamin D3 Softgels - Non-Vegan · 180 softgels · 180 servings · 2,520 IU a servingDetails and price history Add to my stackgelatine capsule, the listing says	2p	46p	1.2 years	£6.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 · 2–3 working days AmazonBuy this product on Amazon (opens in a new tab)	Show the working Servings: 180 ÷ 1 per serving = 180 In the pack: 180 × 2,520 IU = 453,600 IU £6.99 ÷ 453,600 IU × 1,000 IU = 1.54p per 1,000 IU Amount per serving: stated on the label. What the retailer's listing says pack units “180Softgels” units per serving “Consume 1 softgel daily” amount per serving “Vitamin D ; 63μg ; 1260” Is this wrong? Tell us

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By shop

Each shop's vitamin D3 products, with where its cheapest sits in the market.

How we work out these prices

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.

Questions

Where can I buy vitamin D3 cheapest in the UK?

On 29 October 2026, the cheapest vitamin D3 per dose from a UK seller was High-Strength Vitamin D3 Tablets at WeightWorld (1p per 1,000 IU, 17p a month). Then Vitamin D3 4000iu - 365. 1 year supply. / Zip-Lock Eco Bag at ZipVit (1p per 1,000 IU, 17p a month) and Vitamin D3 + K2 (MK7) Tablets at WeightWorld (1p per 1,000 IU, 21p a month). That is by price per 1,000 IU, across 20 UK retailers and 207 products, with every price checked daily; the table above shows the working for each.

What is the best price per 1,000 IU of vitamin D3 today?

1p per 1,000 IU, for High-Strength Vitamin D3 Tablets at WeightWorld (1p per 1,000 IU, 17p a month), on 29 October 2026. The dearest of the 207 products we price is £1.13 per 1,000 IU, and the middle one is 8p.

How much does vitamin D3 cost per month?

At one 1,000 IU dose a day, the cheapest works out at 17p a month, for High-Strength Vitamin D3 Tablets at WeightWorld, on 29 October 2026. Across the 207 products we price it runs from 17p to £33.95 a month. A month is 30 days, and the figure follows the dose you enter in the table.

Which vitamin D3 form is cheapest per dose?

On 29 October 2026: vitamin D3 from 1p per 1,000 IU (WeightWorld) and vitamin D2 from 1p per 1,000 IU (Simply Supplements). The forms differ in what they contain, so this is a fact about price and not a recommendation of one over another.

Do bigger vitamin D3 packs cost less per dose?

Mostly, yes: on 29 October 2026, the 102 packs that last more than six months average 5p per 1,000 IU, against 27p for the 105 that last six months or less. The table marks the cheapest pack that lasts six months or less as the best value for anyone who would rather not buy a year at once.

How long does a pack of vitamin D3 last?

At one 1,000 IU dose a day, the packs we price last from 9 days to 5.9 years; the middle one lasts 6 months. Each row says how long its pack lasts at the dose you enter.

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 the vitamin d3 forms in separate tables?

We only rank products against others of the same form, because someone buying one form would not usually see another as a like-for-like substitute on price. Forms we compare separately: Vitamin D3; Vitamin D2.

Why is a product I have seen in the shops missing?

If a retailer’s listing does not let us confirm the amount per serving, the pack size or the form, we do not guess and we do not show the product. It appears once its label has been read and confirmed.

How up to date are the prices?

Prices on this page were last checked on 29 October 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 earn a commission when you buy through our links, but the order is set only by price per dose. No retailer or brand can pay for position.

Comparing vitamin D3

Vitamin D3

Only combination products for this form

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Vitamin D, twice a year

By shop

How we work out these prices

Questions