• Useful for proper intestinal absorption and maintenance of serum levels of calcium, magnesium and phosphorus: contributes to the proper development and balance of bones, teeth and cartilage and for the contractility of muscle cells
  • Useful for cell growth, influences production of glutathione with antioxidant effect, improves inflammation, interacts with the immune system and in particular with monocytes and activated T and B lymphocytes
  • Stimulates the production of endorphins, which are often lacking in states of depression.
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Food supplement containing Vitamin D3 (cholecalciferol) for support in deficiency states.
Vitamin D3 or cholecalciferol is a fat-soluble vitamin synthesised in the skin as a precursor (a biologically inactive form) and then converted into an active form as calcitriol through two steps: exposure to the sun, particularly UVB rays, followed by changes in the kidneys and liver. Calcitriol circulates in the blood to target cells that possess the VDR (Vitamin-D Receptor).

Vitamin D3 is the most active of the whole family, and there are 5 subtypes: D1, D2, D3, D4 and D5.

Its biological functions include correct intestinal absorption and balance of calcium, magnesium and phosphorus, correct development of the skeletal system and teeth, maintenance of bone metabolism for correct mineralisation and maintenance of cartilage trophism.

In addition, Vitamin D also influences the reduction of inflammation and the synthesis of glutathione (GSH) with an antioxidant effect, the regulation of cell growth, the contractility of muscle cells, the production of endorphins, with a positive effect on mood and depression, and the immune system, as it can act on activated T and B lymphocytes, monocytes-macrophages and dendritic cells.

Maternal milk and foodstuffs are generally low in D vitamins. In addition, people do not always have sufficient exposure to the sun’s rays, either because of seasonal factors, because of work (shift workers, for example) or because mobility and self-sufficiency may be limited with advancing age. There are also conditions at particular risk of vitamin D deficiency, such as pregnancy and breastfeeding and the menopause, restrictive diets, diseases causing malabsorption, and certain medications.
Vitamin D deficiency is therefore also a current problem in the western world.
The consequences of inadequate vitamin D can be manifested as osteomalacia/osteoporosis (bone loss) in adults or rickets in children (without vitamin D, calcium absorption from food drops from the usual 60-80% to 15%), but also fatigue, vulnerability to infection, difficulty in healing wounds, low mood and confusion.


Product included in the supplement register of the Italian Ministry of Health under the no. 100684


Composition: 1 tablet 

Vitamin D3 1000IU 1000IU

Raw materials

Food supplement containing Vitamin D3 (cholecalciferol) for support in deficiency states.

Vitamin D3

DNATURAL® contains Vitamin D3 of plant origin. It is extracted from lichens (Cladonia rangiferina), a symbiotic association of fungi and algae. Traditionally used as food for their nutritional value, lichens have also been used since the Middle Ages to treat fevers, colds and arthritis because of their antiseptic, soothing and expectorant properties. They were also applied as a compress to relieve joint pain.

The preparation is suitable for Vegans and Vegetarians (raw material certified by the Vegan awareness foundation and the American Vegetarian Association).

How to use

It is recommended to take 1 tablet daily or as prescribed by your doctor.