Sunbathe Safely: Sunscreen
Sunscreen creams on the market that work in different ways to protect against the sun thanks to the presence of chemical filters and / or physical.
The chemical sunscreen
These are substances that penetrate the skin after absorbing sunlight, thus preventing active in the deeper layers and cause injury. Some chemical filters only provide protection against UVB rays (ultraviolet-B), while others protect against UVB and UVA.
The physical filter
On the other hand, place a thin membrane like a mirror at the top of the skin and reflect sunlight. Physical filters are usually light colored, for example, white zinc oxide. Protect against both UVA rays, and UVB.
UVA rays penetrate to deeper tissue and cause the skin to age prematurely. UVB rays are those that affect the top layer of skin, and is the reason why we produce melanin and tan, but they also cause burning and skin cancer.
For optimum protection, ideal, it is best to choose a sunscreen that protects against UVA and UVB rays. Those who have a tendency to have allergies to ingredients in sunscreens should opt for others that did not arise and ultimately opt for the physical filter only.