Vitamin D3 (Unflavoured)

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Product Overview
120 days supply


The Science in Sport Vitamin D3 is formulated with 5000iu vitamin D3.


Vitamin D3 is one of the most popular daily supplements and it is associated with a number of health and performance benefits: increased cognition, immune health, bone health, muscle repair, recovery and muscle function.


Benefits of Science in Sport Vitamin D3


Vitamin D3 deficiency is common in both the general public and athletic populations. This may be due, in part, to: living at far northern or southern latitudes, training indoors, protective clothing, sun-screen or consciously avoiding sun exposure. All of these factors reduce the specific sun exposure required for the body to synthesize vitamin D3.


Studies reporting positive effects of vitamin D3 supplementation often measure performance and health benefits from correcting deficiencies. More specifically, vitamin D3 supplementation has been shown to support immune function. Additionally, during exercise stress is placed on the working muscle, resulting in muscle tissue breakdown. The adaptive process of repairing the muscle promotes muscle remodelling and drives performance improvements. Supplementing with vitamin D3 may have a beneficial role in skeletal muscle repair and remodelling.


Vitamin D3 is tested under the Informed Sport Certification program. This approach involves testing every single batch of SIS finished product, which leaves the Company’s factory, screened against the 2018 World Anti-Doping Agency (WADA) list. Banned substances including steroids are tested to the level of 10 Nanograms per gram, and stimulants to 100 Nanograms per gram. Batches (sampled at the beginning, during and end of each product batch) receive the recognised and respected Informed Sport* certificate and Science in Sport provides the documentation to athletes on request.

Suggested Use
Directions For Use
  • Consume 1 tablet per day with food.
  • Designed as a convenient and easy way to keep your Vitamin D3 levels topped up
Nutritional Information
Suitable For
Nutrition Stats
Per Serving (1 Tablet)
Vitamin D3 5000iu (2500% RI*)

*reference intake of an average adult (8400 kj/2000 kcla).


Bulking Agents (Microcrystalline Callulose, Dicalcium Phosphate, Vitamin D3 (Cholecalciferol), Anti-Caking Agents (Magnesium Stearate, Silica), Xanthan Gum


What Vitamin D3?

Vitamin D3 is a fat-soluble nutrient, which can be synthesized through sun exposure to the skin or taken in through the diet. However, dietary sources are limited, and the required sun exposure only occurs year-round near the equator.


What does Vitamin D3 do in the body?

Maintaining optimal Vitamin D3 levels in the body is associated with a number of health and performance benefits: increased cognition, immune health, bone health, muscle repair, recovery and muscle function (1, 2, 3, 4).


Why Science in Sport?

The Science in Sport Vitamin D3 was formulated to meet the dosages used in research and practice to correct deficiencies, support athlete health and performance.


When should I take Vitamin D3?

Vitamin D is one of the fat-soluble vitamins in the body, take one table per day with food.


Is it Informed Sport tested?

Yes, The Science in Sport Vitamin D3 is tested under the Informed Sport programme.


Reviews (13 Reviews)
Showing 13 of 13 reviews

Easy size to swallow for the best immune support during winter.

Paul Bartlett


Perfect products and very fast delivery, thank you

Csaba Bacsak


Good product

Mr Blakemore


Great product. More ordered

Andreia Teixeira



Lenny McKnight


Rather a large quantity per tablet, would prefer smaller doses of vitamin D3.



Good product



Nunca llego



Great addition to healthy lifestyle






Aveva acquistato questo prodotto e insieme avrei dovuto ricevere dei gel omaggio che non sono mai arrivati. Inoltre, le immagini sul sito non fanno vedere la grandezza delle compresse.

Antonio Rubino


amazing product. Keeping me strong

paul newman


Hopefully helping to keep COVID and other lurgies at bay...

Ginny Stacy-Marks