10 Best Vitamins D3 in The UK

Last updated on 02/07/2025

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Vitamin D3 4000 IU - 365 Ultra Strength Softgel Capsules not Tablets - 1 Year Supply - Easy to Swallow - Quadruple Strength - Vitamin D Supplement - Made in The UK - Nu U Nutrition

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Why We Love It

Quadruple strength for optimal dosage.
Year-long supply offers convenience.
UK made ensures quality.

Main Highlights

✔ QUADRUPLE STRENGTH D3 - Our ultra strength Vitamin D3 4000 IU supplement is one of the most powerful formulations available. Offering FOUR TIMES the strength of regular vit d products which offer 1000 IU per softgel you would need to take 4 to achieve the same dosage. Our one a day, small softgels are easy to swallow and offer a convenient way to take vitamin D3.
✔ 12 MONTH'S SUPPLY - We offer an incredible 365 softgels per bottle. UNBEATABLE VALUE keeping you replenished with Vitamin D for a FULL YEAR. You won’t have to worry about running out or reordering until next year with our 52 week supply. Our softgels are GMO free, as well as free of gluten, wheat and dairy.
✔ D3 WITHOUT THE SUN - Sunlight is the most common source of Vitamin D but most people don’t get enough exposure to remain healthy. Our Vitamin D3 from cholecalciferol is the same form of Vit D your skin cells produce naturally when exposed to sun. Vitamin D3 is vital and contributes to the maintenance of normal bones, teeth, muscle function and the normal absorption/utilisation of calcium and phosphorus.
✔ UK MADE PRODUCT - Our Vitamin D is made in the UK to current GMP standards. We ensure all our products meet stringent UK/EU legislation to maintain a high level of health and safety standards. We provide genuine quality assurance; we want you to be satisfied!
✔ THE NU U NUTRITION STORY - TRUSTED SUPPLIER OF NUTRITIONAL SUPPLEMENTS - Starting as a family business in 2014, we’ve expanded to offer a diverse range of high-quality supplements designed to support different lifestyles. Our mission is to make wellness simple, with premium ingredients that cater to your daily nutritional needs—whether for general health or targeted goals.

Vitamin D3 4000 iu & Vitamin K2 MK7 100μg - 1 Year Supply, 365 Easy-Swallow Vitamin D3 K2 Tablets, 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements, UK Made Vitamin D Tablets

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Why We Love It

Year-long supply in a pouch.
Optimal absorption and efficacy.
Sustainably delivered, allergen free.

Main Highlights

Why Choose Nutrition Geeks Vit D3 K2: Get 2X more than other brands with a year's supply of 365 tablets in a pouch. Each tablet combines Vitamin D 4000 iu with 100μg of K2. Vit D is crucial for bone health and immune support, while Vitamin K2 ensures calcium is deposited in your bones and not the arteries. Our Vitamin D3 and K2 high strength formula is designed for optimal absorption and efficacy.
Easy to Swallow With No Aftertaste: Our Vitamin D K2 tablets have been uniquely formulated to be just 6mm in diameter - so small you won't even notice when you swallow them!
Letterbox Friendly and Great Value for Money: Our slim packaging makes our Vitamin D and K2 easy to store and cost-effective to post unlike other bottled high strength vitamin d & K2 vitamin supplements including vitamin d spray & vitamin d drops.
Vegetarian Vitamin D3 Tablets & Allergen Free: We understand the importance of providing vitamin d supplements that cater to everyone's needs; are sourced & produced ethically AND at an accessible price to customers. Our tablets are Gluten-free, Dairy-free, Cruelty-free.
Scientifically Proven Supplements Uncomplicated, So You Can Get The Most Out of Life. Accessible to Everyone. Delivered To You Sustainably: Good health is a need not a want. We are on a mission to make quality, science backed nutrition sustainably accessible to everyone. Less plastic, less waste. We have also committed to be the UK's leading sustainable supplement provider with a Net Zero target.

Supports overall health and wellness.
Promotes bone, joint, and immune health.
Vegetarian-friendly and gluten-free.

Main Highlights

VEGETARIAN VITAMIN D3 4000IU TABLETS: Vitamin D 4000IU is a supplement designed for daily use when sunlight exposure is limited. Each serving provides 4000IU of Vitamin D in a robust formula from WeightWorld. Each bottle contains 400 micro tablets for 14 months (1+ year supply). Just take 1 tablet a day!
WHY TO TAKE VITAMIN D3? Vitamin D is produced naturally through biological processes in response to sunlight and is found in specific dietary sources such as oily fish, mushrooms and eggs. However, meeting daily needs through diet and sun alone can be challenging. Vitamin D3 is an ideal choice for both men and women.
WEIGHTWORLD VITAMIN D TABLETS: Vitamin D contributes to the maintenance of normal bones & the maintenance of normal muscle function. It contributes to the normal function of the immune system; It also contributes to normal blood calcium levels and normal absorption/utilisation of calcium & phosphorus (EFSA Claims).
VITAMIN D TABLETS: Vitamin D tablets in Cholecalciferol form is crafted for both women & men, these high strength Vitamin D3 Tablets are suitable for vegetarians. Manufactured in the UK under strict GMP standards, each 8mm tablet is easy to swallow.
TRUSTED FOR HEALTH SINCE 2006: A British-grown family business with over a decade of experience, offering a range of over 200 vitamins, supplements, and devices. All products are developed through thorough research, adhering to GMP standards, and crafted in the UK to meet diverse nutritional requirements. Suitable for vegans and vegetarians, they are formulated to provide a wholesome approach to living.

Vitamin D 4,000 IU Softgels, Maximum Strength Vitamin D3 Supplement, 365 Easy to Swallow Softgels (Not Tablets) - Full Year Supply

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Why We Love It

Strong vitamin D supplement available.
Created with no artificial ingredients.
Full year's supply provided.

Main Highlights

MAXIMUM STRENGTH - Our Vitamin D supplement offers 4,000 IU per softgel to give you more of the "sunshine vitamin" your body needs.
NO ARTIFICIAL INGREDIENTS - MADE IN THE UK. We care about how your vitamins are made and what's in them. Vitamin D3 from Vita Premium is manufactured with zero artificial ingredients, right here in the UK to the highest manufacturing standards in the world.
FULL YEAR'S SUPPLY - Take just one 4,000 IU Vitamin D3 softgel per day – no need to remind yourself to take multiple tablets throughout the day. For your convenience, each bottle includes 365 softgels. This gives you a full year's supply, so you won't need to re-order again for at least a year.
EFFECTIVE SOLUTION FOR VITAMIN D DEFICIENCIES. In addition to providing a healthy Vitamin D balance for adults, Vitamin D3 from Vita Premium may also be ideal for those who are deficient in Vitamin D. According to the National Institute for Health & Care Excellence (NICE ), approximately 10 million people in England alone are low in Vitamin D and are advised by medical professionals to consider taking a daily supplement.

Vitamin D 1000iu - 1+ Year Supply - High Strength 400 Easy Swallow Tablets - One a Day High Strength Cholecalciferol VIT D3 - Vegetarian Supplement - Microtablets - Made in UK

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Why We Love It

Convenient, high-dose daily tablet.
Yearlong supply offers value.
Supports healthy bones, muscles.

Main Highlights

HIGH DOSE: Our extra strong vitamin d tablets offer a convenient 1 a day tablet to meet your daily needs as an easy to swallow serving.
12 MONTH'S SUPPLY: Our incredible 400 tablet pack gives amazing VALUE keeping you replenished with a max level of d3 vitamin for 12 months. Forget about reordering every month with 52 weeks supply you can be sure you found the best value on Amazon.
SUNSHINE VITAMIN: Vitamin D supports the normal functioning of the immune system, helps to maintain strong bones and teeth and supports muscle function
UK MADE to GMP STANDARDS: Our vitamin d 3 is made and manufactured in the UK with PREMIUM INGREDIENTS to the highest of standards. Incite Nutrition Vit D is Non-GMO and free from artificial colours, flavours and preservatives.
TOP CUSTOMER SERVICE: Everybody responds differently to dietary supplements. If our Multivitamins and Minerals aren't right for you, or you are unsatisfied for any reason, simply contact Incite Nutrition.

Vitamin D 4,000 IU Tablets, Maximum Strength Vitamin D3 Supplement, 365 Easy to Swallow Tablets - Full Year Supply

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Why We Love It

Powerful vitamin D3 dosage.
Vegetarian and allergen-free formulation.
One-year supply for convenience.

Main Highlights

High Potency Vitamin D3 (4,000 IU): Provides a powerful dose of vitamin D3 to help maintain healthy bones, teeth, muscles, and support immune function.
Vegetarian and Allergen-Free: Specially formulated for vegetarians, free from common allergens including gluten, wheat, soya, and dairy.
One-Year Supply: Convenient bottle of 365 tablets means no need for frequent reordering, ensuring consistent daily supplementation for a full year.
UK Quality Assurance: Manufactured in the UK following strict GMP standards, ensuring premium quality and purity with no GMOs, artificial flavors, or colors.
Supports Vitamin D Deficiency: Designed to support those who need to boost their vitamin D levels, especially in regions with limited sunlight exposure.

Vitamin D3 4000 iu - 400 High Strength Easy to Swallow Premium Softgels - Over A Year's Supply - Max Strength Vitamin D3 Cholecalciferol Supplement - Manufactured in The UK by Nutravita

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Why We Love It

Easy daily boost for health.
Quality tested, trusted brand.
Designed for efficient absorption.

Main Highlights

✔ WHY IS NUTRAVITA VITAMIN D3 4000 IU GREAT VALUE FOR MONEY? – Our Maximum Strength Full-Year Supply soft gel capsules with an extra month FREE are especially formulated to aid in normal maintenance of our bones, teeth, muscles and immune system even without the sun (claims substantiated by EFSA – European Food Safety Authority). Taken only once a day, our Vitamin D3 4000 IU comes in small, easy-to-swallow soft gel capsules, not tablets and does not contain bulking or anti-caking agents.
✔ HOW IMPORTANT IS VITAMIN D? – Getting enough Vitamin D is essential for our health as scientific studies indicate that it plays an important role in the process of cell division, in normal absorption of calcium and phosphorus, and in maintaining normal blood calcium levels for healthy bones and teeth (claims are backed up by EFSA). The Vitamin D ingredient in our supplement is sourced from Germany.
✔ WHY DO WE NEED TO TAKE VITAMIN D SUPPLEMENTS? – Vitamin D is produced naturally by the body in response to sunlight and found in certain dietary sources such as oily fish, mushrooms and eggs. However, since it can be difficult to meet the required daily allowance from sunlight and food alone, taking supplements can help maintain satisfactory Vitamin D levels throughout the year.
✔︎ QUALITY TESTED - Unlike many supplements, we haven't spared any expense on quality. Each ingredient is quality tested before the manufacturing process begins, every batch of our supplement undergoes further rigorous quality testing. We have done our best to provide as much information as possible, but if you do have any questions please reach out to our very helpful customer care team. They will be happy to provide personalised assistance to help this supplement fit into your lifestyle.
✔ WHAT IS THE STORY BEHIND NUTRAVITA? - Nutravita is a recognised and trusted Vitamins & Supplements brand providing thousands of customers across the world since 2014. Our high quality products are manufactured, batch tested and certified in the UK, and safeguarded by the highest manufacturing standards in the world (GMP, BRC). We have a dedicated team of pharmacologists, chemists and research scientists working to source the finest and most beneficial ingredients.

Igennus Healthcare Nutrition

Igennus Pure Vitamin D3 2000iu, Clean Label, 365 Small Tablets, 1-Year Supply, Vegetarian High Absorption Cholecalciferol Vitamin D Supplement

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Why We Love It

Optimal vitamin D3 support.
Easily absorbed tablet form.
Offers multiple health benefits.

Main Highlights

IDEAL EVERYDAY DOSE - 2000 IU vitamin D3 supports optimal levels of vitamin D3 in the body without upsetting the delicate calcium to vitamin D3 ratio
OPTIMAL, EASILY ABSORBED, TABLET FORM - cholecalciferol is the superior form produced in the body, which is better absorbed than D2. We also use tablets rather than oil-based capsules to avoid issues with fat malabsorption
EASY-TO-SWALLOW - our vitamin D3 tablets are rounded and just 6mm in diameter, suitable for both children and adults
IMMUNE SUPPORT & MUSCLE FUNCTION – vitamin D3 contributes to normal functioning of the immune system, and by supporting healthy cell division it also helps to maintain normal muscle function
PURE & CLEAN - we only use hypoallergenic ingredients with no unnecessary additives (such as silicon dioxide or magnesium stearate), lab verified, vegetarian (derived from lanolin, not suitable for vegans), GMP manufactured in the UK

Vitamin D 1000iu - 365 Softgels Capsules - 1 a Day - 1 Year Supply - High Strength Vitamin D Supplement - Cholecalciferol VIT D3 - Made in The UK - Nu U Nutrition

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Why We Love It

Control your vitamin dosage.
Contributes to healthy body functions.
Year long supply available.

Main Highlights

✔ 𝗖𝗢𝗡𝗧𝗥𝗢𝗟 𝗬𝗢𝗨𝗥 𝗗𝗢𝗦𝗔𝗚𝗘 - Our 1000 IU Vitamin D3 Softgels give you the ability to CONTROL how much Vitamin D you take.
✔ 𝗦𝗨𝗡𝗦𝗛𝗜𝗡𝗘 𝗩𝗜𝗧𝗔𝗠𝗜𝗡 - Vitamin D 1000iu contributes to the maintenance of normal bones, teeth, muscle function and the normal functioning of the immune system. Vitamin D also contributes to the normal absorption/utilisation of calcium and phosphorus.
✔ 𝟏 𝗬𝗘𝗔𝗥 𝗦𝗨𝗣𝗣𝗟𝗬 - Our incredible 365 softgels Vitamin D complex pack gives amazing VALUE keeping you replenished with Vitamin D for a FULL YEAR (depending on the dosage you choose). No need to remember to reorder every month with 52 week supply.
✔ 𝟏 𝗔 𝗗𝗔𝗬 - One easy to swallow D3 Vitamin softgel a day for full 1000IU of vitamin D per day.
✔ 𝗪𝗘 𝗖𝗔𝗥𝗘, 𝗢𝗩𝗘𝗥 𝟑 𝗠𝗜𝗟𝗟𝗜𝗢𝗡 𝗖𝗨𝗦𝗧𝗢𝗠𝗘𝗥𝗦 - At Nu U Nutrition we are dedicated to not only providing you with premium nutritional supplements derived from the purest sourced ingredients, but we are also committed to providing YOU, our 3 million plus customers with the highest level of customer service possible.

Vitamin D3 4000 IU - 400 High Strength Vitamin D Tablets (1+ Year Supply) - Vegetarian - Immune System Booster - Gluten Free - Vitamin D Supplements - Made in The UK

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Why We Love It

Convenient daily vitamin intake.
Year-long supply provided.
Supports overall physical health.

Main Highlights

MAXIMUM DOSE: Our extra strong vitamin d tablets offer a convenient 1 a day tablet to meet your daily needs as an easy to swallow serving. As individual needs may vary, it is advisable to consult a doctor or a healthcare practitioner prior to taking any supplements.
12 MONTH'S SUPPLY: Our incredible 400 tablet pack gives amazing VALUE keeping you replenished with a max level of d3 vitamin for 12 months. Forget about reordering every month with 52 weeks supply you can be sure you found the best value on Amazon.
SUNSHINE VITAMIN: Vitamin D supports the normal functioning of the immune system, helps to maintain strong bones and teeth and supports muscle function. Gluten Free
UK MADE to GMP STANDARDS: Our vitamin d 3 is made and manufactured in the UK with PREMIUM INGREDIENTS to the highest of standards. Incite Nutrition Vit D is Non-GMO and free from artificial colours, flavours and preservatives.
TOP CUSTOMER SERVICE: Everybody responds differently to dietary supplements. If our Vitamin D3 4000iu aren't right for you, or you are unsatisfied for any reason, simply contact Incite Nutrition.

8.8

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We scanned 1531 products

We reviewed these offers relevant to the Vitamins D3 within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Nu U Nutrition, Nutrition Geeks, WeightWorld, Vita Premium, Incite Nutrition, Nutravita, Igennus Healthcare Nutrition, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Vitamins D3 in the market, we considered we took a deep dive into 7656 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Vitamin D3 4000 IU - 365 Ultra Strength Softgel Capsules not Tablets - 1 Year Supply - Easy to Swallow - Quadruple Strength - Vitamin D Supplement - Made in The UK - Nu U Nutrition. We love many things about this product by Nu U Nutrition. What sets it apart from the competition is Quadruple strength for optimal dosage, Year-long supply offers convenience, UK made ensures quality.
The best value product for most shoppers and where user satisfaction is continuously the highest is Vitamin D3 4000 iu & Vitamin K2 MK7 100μg - 1 Year Supply, 365 Easy-Swallow Vitamin D3 K2 Tablets, 1-A-Day High Strength Vegetarian D3 and K2 Vitamin Supplements, UK Made Vitamin D Tablets by Nutrition Geeks based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Vitamins D3 and the best cost-to-value ratio is Vitamin D 4,000 IU Softgels, Maximum Strength Vitamin D3 Supplement, 365 Easy to Swallow Softgels (Not Tablets) - Full Year Supplyat Vita Premium with a 55% discount.
Our list of the best Vitamins D3 is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Vitamins D3 in The UK

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We scanned 1531 products

We concluded that: