What 1,000 IU of vitamin D costs at UK retailers

Name: Vitamin D: what 1,000 IU costs at UK retailers
Creator: PerDose

Every single-ingredient vitamin D3 product in stock at 18 UK retailers, priced by what 1,000 IU costs rather than by the price on the pack. The cheapest works out at 1p, the dearest at 76p: a 136-fold spread across 118 products.

Figures as of 20 October 2026. This page is recomputed every morning with the prices; download the rows as a CSV.

1pcheapest per 1,000 IUWeightWorld, 4,000 IU × 400 servings, £8.99

76pdearest per 1,000 IUHealf, 640 IU × 30 servings, £14.66

136×between the two118 products, 18 retailers

The cheapest pack is not the cheapest per dose

The cheapest pack on the shelf is Vitamin D3 25UG 90 Tablet at Lloyds Pharmacy, £2.29 for 90 tablets of 1,000 IU. Per 1,000 IU that is 3p, and the pack lasts 3 months at the comparison dose of 1,000 IU a day.

The cheapest per 1,000 IU is High-Strength Vitamin D3 Tablets at WeightWorld, £8.99 for 400 servings of 4,000 IU: 1p per 1,000 IU, and a pack that lasts 4.4 years at the same dose. Cheap per dose often means a big pack of a strong tablet.

Why 1,000 IU, and why two views

The NHS's vitamin D page says to consider “a daily supplement containing 10 micrograms of vitamin D during the autumn and winter”. Ten micrograms is 400 IU. Products on sale run from 400 IU to 5,000 IU per tablet, and priced per 1,000 IU the stronger tablets come out cheaper, so this page shows two views: every strength, and only the tablets of 400 IU to 1,000 IU, the strengths nearest the NHS figure.

In that 400 IU to 1,000 IU band there are 63 products, from 2p (Vitamin D3 Liquid, Healf) to 76p (Kids Vitamin D3 Liquid Drops - Orange - 0.5 oz, Healf): a 40-fold spread. The live table can re-price every row at any dose: per 400 IU or per 1,000 IU.

Every product, cheapest per 1,000 IU first

Pence per 1,000 IU, linear scale. Darker bars are tablets of 400 IU to 1,000 IU. Prices as of 20 October 2026.

#	Product	Retailer	Per tablet	Pack	Price	Per 1,000 IU	Lasts at 1,000 IU a day
1	High-Strength Vitamin D3 Tablets	WeightWorld	4,000 IU	400 servings	£8.99	1p	4.4 years
2	Vitamin D3 4000iu - 365. 1 year supply. / Zip-Lock Eco Bag	ZipVit	4,000 IU	365 tablets	£8.49	1p	4 years
3	Vitamin D3 4000iu Softgels - 365. 1 year supply. / Zip-Lock Eco Bag	ZipVit	4,000 IU	365 softgels	£13.99	1p	4 years
4	Vitamin D3 Tablets 4,000iu	Simply Supplements	4,000 IU	360 tablets	£13.99	1p	3.9 years
5	Vitamin D-3 5,000 IU	Healf	5,000 IU	240 softgels	£11.81	1p	3.3 years
6	Vitamin D3 4000IU - 425 High Strength Softgels Immune System Bone Muscle Support	VitaBright	4,000 IU	425 softgels	£19.99	1p	4.7 years
7	Vitamin D3 Tablets	VitaBright	4,000 IU	425 servings	£19.99	1p	4.7 years
8	Vitamin D3 Softgels - Non-Vegan	Myprotein	2,520 IU	360 softgels	£11.49	1p	2.5 years
9	Vitamin D3 50ug (2000IU) Cholecalciferol 1 Year's Supply 365 Tablets	Lloyds Pharmacy	2,000 IU	365 tablets	£9.76	1p	2 years
10	Vitamin D3 Drops	Healf	4,000 IU	15 ml	£13.49	1p	2.7 years
11	Vitamin D3 4000iu Softgels	ZipVit	4,000 IU	180 softgels	£9.99	1p	2 years
12	Vitamin D-3 5,000 IU	Healf	5,000 IU	120 softgels	£8.49	1p	1.6 years
13	Bio-D-Mulsion Forte® - 1 fl oz	Healf	4,000 IU	365 servings	£25.17	2p	4 years
14	Vitamin D-3 2,000 IU	Healf	2,000 IU	120 softgels	£4.30	2p	8 months
15	Vitamin D3 Tablets 2,000iu	Simply Supplements	2,000 IU	180 tablets	£6.69	2p	12 months
16	Vitamin D3 Softgels - Non-Vegan	Myprotein	2,520 IU	180 softgels	£8.49	2p	1.2 years
17	Vitamin D3 2000IU Tablets	WeightWorld	2,000 IU	400 servings	£14.99	2p	2.2 years
18	Vitamin D3 Liquid	Healf	1,000 IU	750 servings	£14.49	2p	2.1 years
19	Extra Strength D3 2500 IU	Healf	2,500 IU	180 tablets	£8.99	2p	1.2 years
20	Vitamin D-3 2,000 IU	Healf	2,000 IU	240 softgels	£9.99	2p	1.3 years
21	Vitamin D3 - 60 sgels	Healf	5,000 IU	60 softgels	£6.50	2p	10 months
22	Vitamin D3 1000iu - 365. 1 year supply. / Zip-Lock Eco Bag	ZipVit	1,000 IU	365 tablets	£7.99	2p	1 year
23	Vitamin D3 25UG 90 Tablet	Lloyds Pharmacy	1,000 IU	90 tablets	£2.29	3p	3 months
24	Vitamin D-3 1000 IU	Healf	1,000 IU	360 softgels	£9.99	3p	12 months
25	Vitamin D3 2500IU	Healf	2,500 IU	59 ml	£8.49	3p	10 months
26	D3 1000 IU	Healf	1,000 IU	500 tablets	£14.49	3p	1.4 years
27	Ultra Vitamin D 4000IU 96 Tablets	Lloyds Pharmacy	4,000 IU	96 tablets	£11.49	3p	1.1 years
28	Vitamin D3 Gummies - 60 ct	Healf	5,000 IU	60 gummies	£8.99	3p	10 months
29	Ultra Vitamin D 4000IU 96 Tablets	Vitabiotics	4,000 IU	96 tablets	£11.96	3p	1.1 years
30	Vitamin D3 2000iu - Maximum Strength to Support Bone and Immune Health	Lamberts Healthcare (Nature's Best)	2,000 IU	180 capsules	£12.50	3p	12 months
31	Vitamin D3 High Strength	Healf	5,000 IU	60 tablets	£10.66	4p	10 months
32	Ultra Vitamin D 3000IU 96 Tablets	Lloyds Pharmacy	3,000 IU	96 tablets	£10.34	4p	9 months
33	Super Strength Vitamin D3 240 Tablets	Healthspan	1,000 IU	240 tablets	£8.99	4p	8 months
34	Vitamin D3 Capsules	Bio-Synergy	5,000 IU	90 capsules	£16.99	4p	1.2 years
35	Vitamin D-3 2,000 IU	Healf	2,000 IU	30 softgels	£2.36	4p	2 months
36	Vitamin D3 1000iu - Bone Muscle & Teeth Calcium Balance	Vitamin Planet	1,000 IU	300 softgels	£12.38	4p	10 months
37	Ultra Vitamin D 3000IU 96 Tablets	Vitabiotics	3,000 IU	96 tablets	£11.95	4p	9 months
38	High Strength Vitamin D 25 µg Food Supplement 180 Tablets	Boots	1,000 IU	180 tablets	£7.50	4p	6 months
39	Vitamin D3 5000iu High Strength 60 Tablets	Lloyds Pharmacy	5,000 IU	60 tablets	£12.64	4p	10 months
40	Vitamin D3 Gummies	WeightWorld	4,000 IU	120 servings	£20.99	4p	1.3 years
41	Ultra Vitamin D 2000IU 96 Tablets	Lloyds Pharmacy	2,000 IU	96 tablets	£8.49	4p	6 months
42	High Strength Vitamin D 25 µg Food Supplement 90 Tablets	Boots	1,000 IU	90 tablets	£4.00	4p	3 months
43	Extra Strength Vitamin D 75 µg Food Supplement 90 Tablets	Boots	3,000 IU	90 tablets	£12.00	4p	9 months
44	Vitamin D3 4000IU	Healf	4,000 IU	120 capsules	£21.39	4p	1.3 years
45	Vitamin D3 4000IU	Healf	4,000 IU	60 capsules	£10.99	5p	8 months
46	everyday Vitamin D 240 Tablets	Boots	400 IU	240 tablets	£4.50	5p	3 months
47	Vitamin D3 5000 IU	Healf	5,000 IU	60 capsules	£14.49	5p	10 months
48	Ultra Vitamin D 2000IU 96 Tablets	Vitabiotics	2,000 IU	96 tablets	£9.35	5p	6 months
49	Vitamin D3 4000iu 120 Capsules	Healthspan	4,000 IU	120 capsules	£24.99	5p	1.3 years
50	Vitamin D3 50 Plus 180 Capsules	Healthspan	2,000 IU	180 capsules	£18.99	5p	12 months
51	Vitamin D3 1000iu - Supports Immune and Bone Health	Lamberts Healthcare (Nature's Best)	1,000 IU	180 capsules	£9.95	6p	6 months
52	Vegan Vitamin D3 25μg 90 tablets (3 month supply)	Boots	1,000 IU	90 tablets	£5.00	6p	3 months
53	Vitamin D 10 µg Food Supplement, 180 Tablets	Boots	400 IU	180 tablets	£4.00	6p	2 months
54	Ultra Vitamin D 1000IU 96 Tablets	Lloyds Pharmacy	1,000 IU	96 tablets	£5.41	6p	3 months
55	Vitamin D3 5000IU	Healf	5,000 IU	120 capsules	£34.99	6p	1.6 years
56	D3 - Vitamin D 2500IU	Healf	2,500 IU	120 softgels	£17.99	6p	10 months
57	Vitamin D 1000 I.U 25ug 120 Tablets	Holland & Barrett	1,000 IU	120 tablets	£7.35	6p	4 months
58	High Strength Vitamin D3 2000iu	Higher Nature	2,000 IU	120 capsules	£14.95	6p	8 months
59	Vitamin D 1000IU	Healf	1,000 IU	250 softgels	£15.99	6p	8 months
60	Ultra Vitamin D 1000IU 96 Tablets	Vitabiotics	1,000 IU	96 tablets	£6.15	6p	3 months
61	Vitamin D3 1000IU	Healf	1,000 IU	180 tablets	£11.99	7p	6 months
62	Forte D 4000IU	Vitamin Planet	4,000 IU	60 tablets	£16.21	7p	8 months
63	High Strength Vitamin D3 2000iu	Higher Nature	2,000 IU	60 capsules	£8.95	7p	4 months
64	Vitamin D3 2200IU	Healf	2,200 IU	100 capsules	£16.49	7p	7 months
65	Vitamin D-3 400 IU	Healf	400 IU	180 softgels	£5.49	8p	2 months
66	Vitamin D 10 µg Food Supplement 90 Tablets	Boots	400 IU	90 tablets	£2.75	8p	36 days
67	Vitamin D3	Healf	5,000 IU	60 servings	£22.99	8p	10 months
68	Vitamin D3 5000 IU	W-Wellness	5,000 IU	60 capsules	£23.40	8p	10 months
69	Vitamin D 1000IU	Healf	1,000 IU	100 softgels	£7.99	8p	3 months
70	Vitamin D3 2200IU	Healf	2,200 IU	50 capsules	£8.99	8p	4 months
71	Vegan Vitamin D3 1000iu	Lamberts Healthcare (Nature's Best)	1,000 IU	120 capsules	£9.95	8p	4 months
72	Vitamin D3 4000IU	W-Wellness	4,000 IU	60 capsules	£20.48	9p	8 months
73	Vitamin D3 1000IU	Healf	1,000 IU	90 tablets	£7.99	9p	3 months
74	Vitamin D3 400iu - To Support Bone and Immune Health	Lamberts Healthcare (Nature's Best)	400 IU	180 tablets	£6.50	9p	2 months
75	Vitamin D3 Softgels - Vegan	Myprotein	1,000 IU	30 softgels	£2.99	10p	30 days
76	Vitamin D3 Vegan	Healf	2,000 IU	120 capsules	£24.49	10p	8 months
77	Vitamin D3 1000iu (25ug) 90 Tablets	Lloyds Pharmacy	1,000 IU	90 tablets	£9.19	10p	3 months
78	Ultra Vitamin D 400IU	Vitabiotics	400 IU	96 tablets	£3.95	10p	38 days
79	Vitamin D3 1000iu 120 Tablets	Healthspan	1,000 IU	120 tablets	£12.99	11p	4 months
80	Vitamin D3 1000IU Chewable Tablets - 100 chewables	Healf	1,000 IU	100 tablets	£11.49	11p	3 months
81	Vitamin D3 Spray	Healf	1,000 IU	30 ml	£14.99	12p	4 months
82	Vitamin D3 10µg 240 Tablets	Healthspan	400 IU	240 tablets	£11.99	12p	3 months
83	Vitamin D	Healf	1,000 IU	20 ml	£13.00	13p	3 months
84	Vitamin D3	Higher Nature	500 IU	120 capsules	£7.95	13p	2 months
85	Vegan Vitamin D3 1000iu (25ug) 60 Tablets	Lloyds Pharmacy	1,000 IU	60 tablets	£8.04	13p	2 months
86	Vitamin D-1,000	Healf	1,000 IU	180 capsules	£25.99	14p	6 months
87	Vitamin D-1,000	Healf	1,000 IU	90 capsules	£13.02	14p	3 months
88	Vitamin D3 Vegan	W-Wellness	2,000 IU	120 capsules	£34.90	15p	8 months
89	Vitamin D3 Gummies for Kids	WeightWorld	1,000 IU	120 servings	£17.49	15p	4 months
90	Vitamin D3 2000 IU	Healf	2,000 IU	60 capsules	£18.49	15p	4 months
91	Vitamin D3 4000iu	Healf	4,000 IU	30 capsules	£18.70	16p	4 months
92	Vitamin D3 1,000 IU	Healf	1,000 IU	120 capsules	£19.49	16p	4 months
93	Vitamin D3	Healf	4,000 IU	30 ml	£20.49	17p	4 months
94	Vitamin D 30 Gummies	Boots	1,000 IU	30 gummies	£5.20	17p	30 days
95	Vitamin D3 1000iu Gummies	Simply Supplements	1,000 IU	60 gummies	£10.69	18p	2 months
96	Vitamin D3 400iu (10ug) 90 Tablets	Lloyds Pharmacy	400 IU	90 tablets	£6.90	19p	36 days
97	Vitamin D3 1000Iu 60 Vitagummies	Lloyds Pharmacy	1,000 IU	60 gummies	£12.42	21p	2 months
98	Vitamin D3	Together Health	1,000 IU	30 capsules	£6.99	23p	30 days
99	Vitamin D3 Gummies - Strawberry	Healf	1,000 IU	60 gummies	£13.99	23p	2 months
100	Vegan Vitamin D3 400iu Tablets	Simply Supplements	400 IU	120 tablets	£11.29	24p	48 days
101	Infant & Toddler Vitamin D3 Drops - Unflavoured - 0.5 oz	Healf	668 IU	90 servings	£14.66	24p	2 months
102	Vitamin D 500iu 60 Tablets	Lloyds Pharmacy	500 IU	60 tablets	£7.35	25p	30 days
103	Vitamin D3 1000iu	Healf	1,000 IU	60 capsules	£14.89	25p	2 months
104	Vitamin D3	W-Wellness	500 IU	120 capsules	£14.95	25p	2 months
105	Wellbaby Vitamin D Drops	Vitabiotics	400 IU	30 ml	£6.75	28p	24 days
106	Vitamin D3 400iu (10ug) Mini Drops 50ml	Lloyds Pharmacy	400 IU	50 ml	£9.19	46p	20 days
107	Wellkid Marvel Vitamin D	Vitabiotics	500 IU	50 gummies	£11.85	47p	25 days
108	Wellkid Vitamin D Gummies with Star Wars The Mandalorian	Vitabiotics	500 IU	50 gummies	£11.85	47p	25 days
109	Food-Grown Vitamin D	Healf	1,000 IU	30 capsules	£14.80	49p	30 days
110	Protectis Orange Vitamin D3 20 mcg 90 Chewable Tablets	Lloyds Pharmacy	800 IU	90 tablets	£35.74	50p	2 months
111	Wellkid Peppa Pig Vitamin D	Vitabiotics	400 IU	30 gummies	£6.95	58p	12 days
112	Food-Grown Vitamin D	W-Wellness	1,000 IU	30 capsules	£18.00	60p	30 days
113	Vitamin D - Refillable Glass Jar - 30 days supply	Wild Nutrition	1,000 IU	30 servings	£18.50	62p	30 days
114	Vitamin D - Refill Pouch - 30 days supply	Wild Nutrition	1,000 IU	30 servings	£18.50	62p	30 days
115	Childrens Vitamin D Drops	Healf	400 IU	15 ml	£15.19	63p	24 days
116	Food-Grown Vitamin D Gummies	Healf	1,000 IU	60 gummies	£20.00	67p	30 days
117	Food-Grown Vitamin D Gummies	W-Wellness	1,000 IU	60 gummies	£21.00	70p	30 days
118	Kids Vitamin D3 Liquid Drops - Orange - 0.5 oz	Healf	640 IU	30 servings	£14.66	76p	19 days

By strength

Per tablet	Products	Cheapest per 1,000 IU	Dearest per 1,000 IU
400 IU	13	5p	63p
500 IU	5	13p	47p
640 IU	1	76p	76p
668 IU	1	24p	24p
800 IU	1	50p	50p
1,000 IU	42	2p	70p
2,000 IU	15	1p	15p
2,200 IU	2	7p	8p
2,500 IU	3	2p	6p
2,520 IU	2	1p	2p
3,000 IU	3	4p	4p
4,000 IU	19	1p	17p
5,000 IU	11	1p	8p

How this was worked out

Included: single-ingredient vitamin D3 products that were in stock, dispatched from the UK and priced on this site on the morning of 20 October 2026: 118 products at 18 retailers (Bio-Synergy, Boots, Healf, Healthspan, Higher Nature, Holland & Barrett, Lamberts Healthcare (Nature's Best), Lloyds Pharmacy, Myprotein, Simply Supplements, Together Health, Vitabiotics, VitaBright, Vitamin Planet, W-Wellness, WeightWorld, Wild Nutrition, ZipVit). A product is priced only once its stated strength has been read from the retailer's own listing; anything ambiguous is left out.
Left out: 74 vitamin D3 products whose label names a second active ingredient (vitamin K2, calcium, an oil), because their price pays for more than the vitamin D; vitamin D2, which has its own table; and any listing whose label could not be read with confidence.
The sum: pack price ÷ (tablets × IU per tablet) × 1,000. For the cheapest row: £8.99 ÷ (? × 4,000 IU) × 1,000 = 0.562p, shown as 1p. Prices here are rounded to the nearest penny; the spreads use the exact figures. Where a label states a strength in micrograms, 1 microgram is 40 IU.
Prices are the retailers' own listed prices at the morning check, before delivery and without multi-buy offers. Children's products are included where the label states a strength; they sit at the dear end of the table.
“Lasts” is the pack divided by 1,000 IU a day, the comparison dose every vitamin D3 table on this site uses. It is arithmetic, not advice.
Commission: we earn a commission when a reader buys through a link on a product page. It never changes the order of any table. How we compare explains the rules in full.

Figures and the CSV may be quoted with a link to this page. Questions, or another supplement run the same way: hello@perdose.co.uk.