Vitamin D

My mum says I am burned. My dad says I am dark. My sister says I am black. The other says I am red. My colleague says I got a tan. Another nods his head. I say,"yea, I got a bit of the sun."

The below are quoted from www.tomigion.com except for the ones in italics.

1. Vitamin D: the sun vitamin
The sun is an important source of Vitamin D. Our bodies make Vitamin D when sunlight touches our bare skin. However, it has been proved that too much exposure to direct sunlight increases the risk of skin cancer, so wearing a sunscreen with an SPF of 15 or higher is important for reducing the risk of skin cancer and preventing premature aging of the skin. Despite the harmful effect of too much sun, it has also been proven that at least 10-15 minutes of sunlight per day, depending on your skin sensitivity, is actually good for you. A major discovery, esp. for people who live in countries with cold ("sun-less") seasons

2. The lack of Vitamin D may contribute to chronic fatigue and depression
Seasonal Affective Disorder (SAD), a mood disorder caused by the lack of light in winter, is a specific type of major depression. It can appear as the onset of major depression in the fall (September through November) and the symptoms abate in late winter to early spring (March through May). Also, the frequency of SAD can vary depending on the amount of sun in relation to the geographic location.