Rokivit D3

Easy: only 1 capsule per week

Dietary supplement for the treatment of a vitamin D deficiency. Rokivit D3 is convenient and easy to take: 1 capsule per week. Rokivit D3 provides amounts of vitamin D which cannot be attained through a normal balanced diet.

Available in pharmacies

Rokivit D3 daily

1–2 chewable capsules per day

Dietary supplement for the treatment of a Vit D deficiency. Also suitable for children from the age of 4. Rokivit D3 daily provides amounts of Vit D which cannot be attained through a normal balanced diet.

Available in pharmacies

What is Vitamin D?

Origin and function of this important substance

What is the origin of Vitamin D?

Vitamin D is also called the ‘Sunlight Vitamin’. It originates from the skin when the skin is exposed to sunlight. With sunlight, the body produces more than 90% of the required amount of Vitamin D. Of our usual food produce only very few contain significant amounts of Vitamin D. Good examples are eggs and fatty fish. The normal food intake however supplies less than 10% of the daily requirement of Vitamin D.

Historically, with the beginning of the period of industrialisation, people moved from rural areas into cities. The new life in the cities provided much less exposure to sunlight. People lived in small and dark accommodations, and children began to suffer from malformation of their bones (rickets).

How is Vitamin D created?

Through UV B rays in sunlight, the skin creates Vitamin D from 7-Dehydrocholesterin. First, the skin contains Cholecalciferol (Vitamin D3) which it then processes into 25(OH) D. 25(OH) D is measured in the blood.

The skin has an efficient synthesis of Vitamin D. It can be maximised if large areas are exposed to the sun rather than just smaller parts like legs and arms. Close to the equator, a significantly larger amount than the daily requirement of Vitamin D can be synthesised. Strong sunlight does not create toxic amounts of Vitamin D: above the maximum, the UV B rays only produce harmless by-products.

A variety of factors determine the formation of Vitamin D. When sunlight is at its most powerful at noon, the creation of Vitamin D is strongest. Also, the closer you are to the location to the equator, the better. The equator is an imaginary line on the Earth’s surface halfway between the North Pole and South Pole. It divides the Earth into the Northern Hemisphere and Southern Hemisphere.
Other geographic influences on the creation of Vitamin D include the degree of latitude, the altitude above sea level and the amount of air pollution.

What effect does my skin type have on Vitamin D?

Melanin determines the skin colour and how much Vitamin D the body can create. Darker skins have more melanin than lighter skins. In darker skins, less UV B rays enters the skin. Vitamin D is thus easier produced by lighter skin. People with very light skin colour, including blondes and red heads, need 15 minutes of sunlight exposure to produce the necessary amount of Vitamin D. On the other hand, black people require up to 2 hours of sunlight exposure. A good rule of thumb is: expose as many areas of your body as possible to the sun. Also, stay only half as long in the sun as it would normally take for your skin to become red.

Obesity, sun protection (factor 15 reduces the creation of Vitamin D by 99%) and age are important factors in the formation of Vitamin D.

What does Vitamin D do?

What are the effects of Vitamin D?

Vitamin D is essential for healthy and strong bones. Calcium and phosphorus play key role for the strength of the bones, and Vitamin D is required to absorb these minerals. Vitamin D ensures that bones become stronger and the risk of fractures decrease. If the level of Vitamin D is too low, children suffer from deformities of the bones, especially on the legs and torso (rickets). In old people, low levels of Vitamin D lead to weaker bones and an increased risk of fractures.

Currently, research emphasis the impact of Vitamin D on other parts of the body. Initial findings suggest that Vitamin D strengthens the muscular and immune systems. Thereby, it reduces the susceptibility of the respiratory tract to infectious disease. Also, Vitamin D has positive effects on many organs including heart, stomach, intestines, lungs, liver and kidneys as well as the reproductive systems of both women and men.

Is my Vitamin D level too low?

After the synthesis of Vitamin D in the skin or the consumption of Vitamin D products, the blood distributes Vitamin D in the organism. Recent research has shown that a multitude of cells in the body are receptors for Vitamin D. There, Vitamin D becomes active.
Your Vitamin D level is probably too low if you live in Central Europe, your Vitamin D level is probably too low. As important studies have shown, low levels of Vitamin D occur especially during the winter month. The medical definition of a Vitamin D deficiency based on the blood serum (ng/ml) is:


Severe deficiency < 12
Deficiency < 20
Insufficiency 20-30
Normal level > 30
Toxicity > 150

Serum level 25(OH)D, ng/ml

At least 50% of the world population have Vitamin D deficiencies. In Central Europe, this varies according to the seasons of the year. During winter, the levels of Vitamin D are significantly lower. So, it is important to substitute.

How can I receive the right supply of Vitamin D?

Professional societies have issued several guidelines. In general, there is a clear trend to increase the intake of Vitamin D. A dosage of up to 10,000 I.E. per day is considered safe without creating adverse effects. According to the EFSA Panel on Dietetic Products, the daily recommended dose is up to 4,000 I.E. for adults and children between the age of 11 and 17. For children between the ages of 1 and 10, the daily recommended dose is 2,000 I.E. For children below the age of 1, the recommended dose is 1,000 I.E. per day.

Special needs

For pregnant women and women who breast feed, the daily Vitamin D intake is higher. It should be between 4,000 I.E. and 6,000 I.E. daily. The Vitamin D requirement for women who breast feed is the same provided that the infant does not receive Vitamin D. In general, a daily dosage of 4,000 I.E. is required to keep the level of Vitamin D in the normal range.

Most obese people have a Vitamin D deficiency. An increasing amount choose surgery to reduce their weight. Before as well as after the operation, if the usual Vitamin D guidelines are followed, the level of Vitamin D is too low. According to recent studies, after surgery to bypass the stomach, an initial dose of 3×100,000 I.E. of Vitamin D followed by a maintenance dose of 3,420 I.E. per day of Vitamin D is required to increase the level of Vitamin D to a normal level. 

One pack contains 8 capsules of 28,000 I.U. Vitamin D each

This corresponds to a daily dosage of Vitamin D of 4,000 I.U. For adults, 4,000 I.E. of daily Vitamin D is considered safe without side effects. If a lower daily amount of Vitamin D is required, the interval at which the capsules are taken can be extended: for example, 1 capsule only every 2 weeks.

Rokivit D3 is convenient for people with special Vitamin D requirements: osteoporosis, pregnant women and people who are overweight or obese.

Rokivit is a dietary supplement.

One pack contains 30 chewable capsules of 1,000 I.U. Vitamin D each

For children from the age of 4, 1–2 chewable capsules cover their daily Vit D requirement and support the immune system. For older children from the age of 10 and for adults, the intake is 2–4 chewable capsules daily.

Rokivit D3 daily chewable capsules have a fresh lemon flavour: free of artificial flavours, preservatives and colorants.

Rokivit D3 daily is a dietary supplement.

Additional information

For questions about vitamin D and Rokivit D3

UID: ATU 63291217
Handelsregister Wien: FN 290019 z

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