Vitamin D is one of the key building blocks of the human immune system and the importance of vitamin D for bone density has long been recognised. A growing number of studies have shown that high levels of vitamin D can also help to combat many different forms of cancer, along with diabetes and depression.
Short periods of sun exposure are often recommended as a way of building up adequate levels of vitamin D and it is generally considered sufficient to expose the face and hands to sunlight. Danish scientists have tested this recommendation and compared the effect of natural sunlight with that of artificial UV light.
Their study showed that in Europe, natural sunlight is only strong enough to produce vitamin D between April and August. However, significant vitamin D synthesis could only be demonstrated when larger areas of the skin were exposed to sunlight, rather than just the face and hands. The study also shows that artificial UV light is eight times more effective than sunlight for the production of vitamin D.
"Modern lifestyles are responsible for a shortage of vitamin D, which in turn can lead to a wide range of diseases. These studies back our recommendation that moderate exposure using solariums is a good way to synthesize adequate levels of vitamin D", Ad Brand of the Sunlight Research Forum explains.
Quelle:
1) Increase in serum 25-hydroxyvitamin-D3 in humans after solar exposure under natural conditions compared to artificial UVB exposure of hands and face†
Pameli Datta,*a Morten Karsten Bogh,a Peter Olsen,a Pia Eriksen,a Anne Vibeke Schmedes,b Mette Marie-Louise Grage,c Peter Alshede Philipsena and Hans Christian Wulfa; Photochem. Photobiol. Sci., 2012, 11, 1817; DOI: 10.1039/c2pp25093d
Short periods of sun exposure are often recommended as a way of building up adequate levels of vitamin D and it is generally considered sufficient to expose the face and hands to sunlight. Danish scientists have tested this recommendation and compared the effect of natural sunlight with that of artificial UV light.
Their study showed that in Europe, natural sunlight is only strong enough to produce vitamin D between April and August. However, significant vitamin D synthesis could only be demonstrated when larger areas of the skin were exposed to sunlight, rather than just the face and hands. The study also shows that artificial UV light is eight times more effective than sunlight for the production of vitamin D.
"Modern lifestyles are responsible for a shortage of vitamin D, which in turn can lead to a wide range of diseases. These studies back our recommendation that moderate exposure using solariums is a good way to synthesize adequate levels of vitamin D", Ad Brand of the Sunlight Research Forum explains.
Quelle:
1) Increase in serum 25-hydroxyvitamin-D3 in humans after solar exposure under natural conditions compared to artificial UVB exposure of hands and face†
Pameli Datta,*a Morten Karsten Bogh,a Peter Olsen,a Pia Eriksen,a Anne Vibeke Schmedes,b Mette Marie-Louise Grage,c Peter Alshede Philipsena and Hans Christian Wulfa; Photochem. Photobiol. Sci., 2012, 11, 1817; DOI: 10.1039/c2pp25093d
