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Made In The UK to GMP Standards

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Loved By Royalty & Celebrities 

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Established 40 Years Ago

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Stocked In Harrods, Selfridges & JBC

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Recommended By Doctors

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Royal Vitamin D3

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Vitamin D is somewhat the forgotten vitamin, yet it is vitally important for a myriad functions in the human body.

Vitamin D is somewhat the forgotten vitamin, yet it is vitally important for a myriad functions in the human body. It is required for the maintenance of normal bones, normal muscle function, normal teeth and for the normal function of the immune system.  

Commonly, it is known as the sunshine vitamin due to the action of sunlight on the skin by ultraviolet radiation (sunlight) by the activation of a sterol.

Diet is usually a minor source of vitamin D. However foods such as oily fish and eggs contain very small amounts. It is almost impossible to obtain sufficient amounts of vitamin D from diet alone, without adequate exposure to sunlight.  

Given our modern life-style where we spend most of our time indoors and the fact that a modern ‘western-style-diet’ is nutrient deficient we are at considerable risk of a vitamin D deficiency.  Indeed, many researchers consider this situation to be a pandemic. 

In times past, such was the problem of vitamin D deficiency that rickets was common in children and adults.  Rickets is a softening of the bones coupled with deformity, notably a bowing of the legs due to the weight of the torso on the softening bones.

There are several forms of vitamin D, however vitamin D3 (cholecalciferol) is the ‘real’ vitamin D as it is the same substance that is produced in human skin in response to exposure to sunlight.   It is therefore the most preferable form to obtain via supplementation.


Brand Bioceuticals

Natural and best form of vitamin D (D3). This form is made by the body from sunlight

Required for the function of normal muscle

Required for the function of normal bones

Required for building normal teeth

Helps regulate calcium metabolism

Required to address myriad conditions


Vitamin D3 (Cholecalciferol) (800iu) 20mcg


Dicalcium phosphate

Stearic acid



None known at the recommended dose with the exception of those listed below.

Certain medical conditions can increase the risk of hypercalcemia in response to vitamin D, including primary hyperparathyroidism, sarcoidosis, tuberculosis, and lymphoma. People with these conditions may develop hypercalcemia in response to any increase in vitamin D nutrition and should consult a their doctor regarding any increase in vitamin D intake if they have any of these conditions.

Vitamin D Drug Interactions: 

The following medications increase the metabolism of vitamin D and may decrease serum D levels:

Phenytoin (Dilantin)
Fosphenytoin (Cerebyx)
Phenobarbital (Luminal)
Carbamazepine (Tegretol)
and Rifampin (Rimactane)

Store in a cool dry place out of the reach and sight of children.

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