...stimulates the production of vitamin D
Vitamin D is the only vitamin which the body can produce itself. It is formed through UV B radiation in the skin and changed into vitamin D hormone (calcitrial) in the liver and kidneys. We only ingest about 10% from our food - vitamin D is above all found in fatty fish such as eel, salmon, herring or the mackerel.

...ensures strong bones
The body needs vitamin D in order to ingest the mineral calcium from our food. Calcium is important for the functions of the nerves and muscles and ensures above all a healthy tooth substance and stable resilient bones. A lack of calcium in children can lead to rickets and in adults osteoporosis.

...reduces the risk of cancer
Current Canadian, American and Swedish studies prove that the sunlight blocks the growth of cancer cells. Vitamin D regulates the regeneration of cells and reduces the risk for ten types of tumours by 50% (among others for breast, bowel, prostate and pancreatic cancers.)

...strengthens the myocardial muscle
Studies at the University of Bonn and at the Heart and Diabetes Centre in North Rhine-Westphalia proved a dramatic lack of vitamin D in patients with distinctive heart failure. Apparently the vitamin D receptors in the myocardial muscle cells are not sufficiently stimulated due to the undersupply.

...increases the serotonin levels
Through the retina of the eye, impulses are passed on to the brain. The distribution of many hormones is also coordinated in this way. Sunlight stimulates the production of the 'feel good hormone' serotonin when there is a lack of light the body increasingly forms melatonin. That makes you sleepy, unmotivated and sometimes even depressive.