Vitamin D from diet or skin synthesis is inactive at first, liver and kidneys are required for its activation. Because the body can produce the vitamin on its own it could be considered a hormone rather than a vitamin. Vitamin D deficiency has become a popular problem due to changed living conditions, for example being at the office in a closed room all day. According to the Robert-Koch institute most people are not provided with a sufficient quantity of vitamin D.

• heart-related or vascular diseases (e.g. heart attack, atherosclerosis, …)
• hormones, neurotransmitters (e.g. depression, schizophrenia, …)
• minerals in your body (e.g. caries, osteoporosis, …)
• cell cycle (e.g. colorectal cancer, hair loss, …)
• metabolism (e.g. diabetes, irritable bowel syndrome, …)
• immune system (e.g. asthma, multiple sclerosis, neurodermatitis, vaginal infections, …)
• regeneration of nerve cells and neurons (e.g. migraine, chronic diseases, Alzheimer's disease, …)

During summer, sunscreens prevent sunlight from generating vitamin D in the skin. In winter it is sometimes not possible to reach a sufficient amount of sun exposure as the sun sets earlier. Moderate sunbathing in a tanning studio can be a remedy to this problem. Modern tanning beds are equipped with special tubes which provide UVA and UVB radiation and can thus perfectly counteract vitamin D deficiency.

You have to sweat to get good tanning results!
WRONG! You do NOT have to sweat to get good tanning results! Example: If it is windy at the beach your skin will still get a nice tan. Not sweating does not mean that the sun is less powerful. That is also why air-conditioned tanning beds do not negatively affect your tanning results.

It is not possible to do Pre-Tanning!
WRONG! It is possible to pre-tan in order to prepare your skin for a holiday. Sunlight builds up a natural sun protection by thickening the skin. The UVB-intensity of modern tanning beds is comparable to the natural sun, that is why tanning bed radiation builds up a natural sun protection, too

Your tan will be washed off when showering!
WRONG! It is possible to wash off residues of make-up or self-tanning lotions, but it is not possible to wash off your tanned skin pigments. Example: Even though you go swimming in summer your skin does not lose its color. Nevertheless, it is important to use a good skin care product that nourishes and hydrates the skin to make your tan last longer.

After tanning, it is important to wait at least an hour before taking a shower!
WRONG! Heat opens skin pores, through which harmful substances from shampoo or body wash could pass into your blood circulation. This could happen if you took a very long and hot shower immediately after the tanning process. Even a short way home back home takes enough time to cool down the pores again and make them shrink to their normal size. You can therefore take a shower without worrying after returning home.

Tanning causes skin cancer!
WRONG! A research team led by Prof. Dr. Jörg Reichrath, Dermatologic Clinic at University Hospital Homburg, came to the conclusion that there is NO definite link between moderate sunbathing and an increased risk of malignant melanoma, a form of skin cancer. Prof. Dr. Jörg Reichrath states that studies of WHO or European Union are based on insufficient data.