How does a sun cream block the sunlight?

Sun screens use various chemical to break up and interact with your skin. Are they good for you? Many commercial sun screens are just as bad for you, or even worse for you, as being out in the sun without protection. read more

Many commercial sun screens are just as bad for you, or even worse for you, as being out in the sun without protection. They contain chemicals called parabens. The problem with parabens is that they come from the petrochemical industry and are in fact little crystal. read more

Sunscreen combines organic and inorganic chemicals to filter the light from the sun so that less of it reaches the deeper layers of your skin. Like a screen door, some light penetrates, but not as much as if the door wasn't present. read more

A sunscreen with an SPF of 15 protects against about 93 percent of UVB rays, and one with an SPF of 30 protects against 97 percent of rays, according to the Mayo Clinic. No SPF can block 100 percent of UV rays. read more