Ageing skin by influence of ultraviolet rays

Exposure to ultraviolet rays can be cause of having spots and wrinkles. It makes skin aged rapidly.
Though it is only short time to have ultraviolet rays, few hours later enzymes which cut collagens of a skin off are started to be secreted. Getting suntan can be cause of skin trouble but, accumulated damages due to ultraviolet rays are more serious. It is important that is to do UV protection every day.
For using every day, it is good a sunblock which is SPF 21 or under. Since sunblock of over SPF 22 can give the skin damage. A sunblock containing nutritious ingredients is much better.