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High Strength Vitamin D3 Tablets - 4000iu

Premium Natural Source Vitamin D3 - the form most readily absorbed by the body

304 reviews9610020
Buy High Strength Vitamin D3 Tablets - 4000iu
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  • Description
  • Product Information
  • Feefo Reviews Reviews

Key features

  • Super strength 1 a day tablet
  • Helps build strong bones and teeth
  • Ideal strength to quickly correct deficiency
  • 2000% Nutrient Reference Value
High Strength Vitamin D3 4000iu tablet view
Tablet Size
8mm Round tablet

Our Vitamin D3 4000iu is the optimum level recommended by nutritionists to quickly correct deficiency. Vitamin D supplementation can play an important role in correcting Vitamin D deficiency to ensure the maintenance of adequate levels in the body.

Vitamin D plays a number of crucial roles in the body including providing support for immune health, muscle health and strong bones and teeth. Vitamin D can be obtained through food sources such as eggs, fortified cereals and oily fish, but is predominantly synthesised in the skin through exposure to sunlight - hence why it is often referred to as the 'sunshine vitamin'.

Most healthy adults should theoretically be able to get enough Vitamin D from being outside in the sunshine, however Vitamin D deficiency is very common throughout the UK. This is as a result of a low level of exposure to sunlight, making Vitamin D synthesis almost impossible during the winter.

High strength, natural form tablet

Our 4000iu high strength Vitamin D supplement provides 100µg (2000% Nutrient Reference Value) in an 8mm round, odourless tablet with no coating. We use a high quality natural form of Vitamin D, Cholecalciferol (Vitamin D3) in this supplement - the form of Vitamin D most readily absorbed by the body. Our manufacturing process gives us a highly concentrated form of Vitamin D3 which offers 99% purity and unbeatable quality.

Recommended as a food supplement by the FSA

The Food Standards Agency recommends that if you are pregnant or breastfeeding you should take a 400iu/ 10µg supplement of Vitamin D each day.

People who may be at risk from Vitamin D deficiency include people who:
  • are of Asian origin
  • rarely get outdoors
  • eat no meat or oily fish

Vitamin D and rickets in children

Vitamin D is crucial for the maintenance of health and strong bones, a deficiency in Vitamin D can cause rickets in young children which is a weakening and softening of bones which can lead to bone deformities. After World War II instances of rickets in the UK were dramatically fewer due to the British government introducing cod liver oil as a supplement - this is a great food source of Vitamin D. However between 2003 and 2013 the NHS reported a 430% increase in cases of rickets, an alarming statistic highlighting a growing health problem.  

Nutritional Information

One tablet typically provides: 
Vitamin D3 (4000iu) 100µg 2000% NRV

NRV = Nutrient Reference Value, µg = micrograms, iu = international units

Allergen Advice
Any allergens are highlighted in bold in the ingredients list.
List of Ingredients
Dibasic Calcium Phosphate, Microcrystalline Cellulose, Vitamin D3 Preparation (Sucrose, Modified Starch, Maltodextrin, Cholecalciferol), Stearic Acid, Magnesium Stearate, Silicon Dioxide
Dosage / Suggested Intake
Take one tablet per day with food. 
Legal Category
Food Supplement


Customer Reviews for High Strength Vitamin D3 4000iu

The views expressed below are the personal opinion of Just Vitamins customers. Just Vitamins does not endorse these views, nor should they be regarded as health claims or medical advice. All reviews are collected and verified as genuine by a 3rd party called Feefo.

Overall product rating 9.6 / 10 - 304 customers have independently reviewed and recommend High Strength Vitamin D3 from 304 reviews (showing latest 50 reviews)
Review Date
Review Details
Service rating: Great service as always, fast delivery
Product: Great service, fast delivery
Very prompt service and good value for money
Fast and reliable
Service rating: Good website
Product: Nice nice nice nice nicee
All items ordered were in stock, and all items arrived together. Good selection of products, good quality, good packaging and service. Easy to use web site.
Service rating: Came quick and good product thanks
Product: Vitamin D dddddddddddddddddd
Service rating: Fast, free delivery - and a great price. Would definitely order again!
Product: Great for the body - this is the perfect dose.
Does the job
The price is very good and they arrived on time and as expected. I could not tell about the quality of the vitamins yet as I have been taking them for just a few days. I will be buying again from Just Vitamins, thank you :)
Service rating: Prompt service would use again
Product: The tablets contain the highest daily recommended quantity of vitamin D
Service rating: Good prices and quick delivery of items
Product: I am vitamin d deficient and have to take a high strength tablet all the time.
Service rating: I think it a brillant service and they deliver dates are correct too.
Product: I have notice a difference from taking these vitamins I have been advised to take them due to my health.
Service rating: Excellent, fast service and good communication.
Product: Excellent , fast service and good communication.
Service rating: The service is excellent. my on line order arrived within a couple of day.
I used to buy from Holland & Barrett , but they are far more expensive.
Product: Vit D is supposed to be very useful during this time. It was recommended by many doctors on YouTube
Service rating: Always sharp delivery and high quality products.
Product: Generally feel a lot healthier by taking vitamin d supplements
Service rating: I was easily able to find what my husband and daughter take. And placing an order was easy too.
No nonsense packaging, and swift delivery.
my husband seems happy with his, daughter has not started hers yet.
I will use Just Vitamins again.
Product: My husband rarely goes out, and needs Vitamin D. it was a struggle to find until I came across Just Vitamins
Service rating: Great fast service, quality vitamins at affordable prices. Helps my health conditions. 10/10
Product: Take for Fibromyalgia. joints better.
Service rating: Fast service great tasting vitamins in appealing packaging
Product: Great packaging yet to try consistently as it’s summer now I’ll start in the less sunny months
Service rating: Orders are always accurate. Speedy delivery
Product: Love they're high strength
Service rating: The product is fine. However, paying extra for quick delivery is disappointing when the package takes five days to arrive.
Product: Supplement works for me, no side effects. I'm in my eighties and at high risk from Covid 19 due to other problems. Anything that helps to protect me is worth taking.
Service rating: Excellent service and high quality product, thank you.
Product: High quality taken as part of support and boost for immune system.
Service rating: Prompt service. No problems.
Product: I Take it as an alternative to a prescription med so I guess it us doing its job. I have no idea
Service rating: Prompt delivery and good value for money
Product: Taking this to improve bones and teeth
Service rating: Quick delivery
Product: Always take vit c and have added zinc due to the current situation would have liked a much larger dose though and am also taking 1000 vit c supplement
Service rating: Have ordered numerous times from this company, never had any problems. Excellent service. Five star
Product: Only just started to take this product. Too early to advise on the results.
Well packed
Feedback Response: Hello. You commented that the product was "well packed", which I took as a positive comment, but then you left a 1-star review! Can I offer any further assistance?
Excellent, very efficient service. Will use again.
Fast delivery easy to order
Efficient as always
As stated, excellent from start to finish. Will be ordering again as needed.
Service rating: The service is excellent. Always prompt delivery
Product: I take this supplement as I have MS & find it to be beneficial
Service rating: Brilliant service. Came within 2 days. Tablets make me feel so much better than I did x
Product: Vit d deficiency
All good. Happy with service and goods.
Service rating: Livraison rapide et produit ok
Product: Bon complément pour la santé.
Service rating: Great value and reliable service
Product: Cheapest but high strength
Good service. I will be ordering again.
Good quality, cheaper than competitors, prompt and free delivery. Would definitely recommend.
Service rating: Top quality products, great prices, speedy delivery and recyclable packing
Product: Easy to swallow tablet form and in doses not found elsewhere.
Service rating: Very fast service and excellent product.
Product: Very easy to take and relieved aching joints and combats fatigue.
Service rating: Very speedy service
Product: Needed ito support bone growth in my mouth to have some dental implants
It's a very good service keep up the good work.
Service rating: Service was speedy! Used to get supplements off the high street but the ones at Just Vitamins are almost 5 times the strength for the same or lower price! Feeling great so far and love the sea kelp to help my hair grow! :)
Product: My boyfriend gets a dark patch on his back when he doesn’t get sunlight so these really help! Thanks!
Simple to use website, products arrive quickly. I’m also very happy that they’ve change to compostable packaging!!
Service rating: All o.k. bar one item ordered wasn't sent, instead an item I hadn't ordered was sent. Had to mention to Customer Services who replied fast & sent missing item quickly as well as a postage paid jiffy envelope for returning wrong item. Very hood Customer service. Repeat Customer for years, & this has been only problem.
Product: Good price for high strength supplement.
Service rating: Easy to use service
Not sure abt product yet as too soon to tell
Product: Easy to swallow pill
Too soon to tell if this has made a difference
Service rating: Ottimo venditore. Ottimo prodotto. Ottimi prezzi. Ottimo sistema di confezionamento. Ottima Spedizione. Tempi di consegna per posta ordinaria accettabili visto che viene consegnato da Poste italiane.
Vivamente consigliato. Grazie
Product: E' la prima volta che li acquisto e devo verificare il risultato.
Just Great
Service rating: They always deliver,only once in 15 years has a delivery got lost

High quality products and a marvelous range
Product: Fantastic product and quality
Service rating: Bought before, reliable delivery, good value.
Product: Bought before, reliable delivery, good value.
Service was good, fast delivery and comms great.