Short answer: Not entirely. Excessive exposure to ultraviolet (UV) radiation causes skin cancer, premature aging and cataracts, but a little sunshine helps keep bones strong. Here's a look at where fun in the sun gets a bit shady:
Don't people need regular sun exposure to get enough vitamin D?
Yes. The body uses UV light to make vitamin D, which is vital for bone health, but the fair-skinned need only a few minutes of summer-sun exposure on the face and forearms and can get their winter D from fortified milk or vitamins.
Is indoor tanning any safer than sunbathing?