Life outdoors and prudent sun exposure are very healthy because the sun provides a warm, relaxing, feeling, energizing and antidepressant action, in addition to helping the synthesis of vitamin D. However excessive and repeated sunlight exposure leads to irreversible damage to the skin, increases the appearance of skin disorders and accelerated aging.
Therefore, experts recommend using sunscreen that helps minimize the effects of sunlight on the skin, to protect it from ultraviolet rays which are the A and B (UVA and UVB).
The difference between them is that the UVB radiation reaches the surface layers of the skin and is responsible for the redness and sunburn. UVA radiation is responsible for premature aging, it is the one that intrudes into the deeper layers and through the windowpanes and glasses. For this reason it is extremely important to choose a sunscreen that protects against both types of radiation.
Requirements to be met by a good sunscreen
The number of sunscreen with SPF or accompanied FPS acronym (should not be less than 6 and should shield from all UV radiation spectrum); the labelling must contain the explanation of the sun protection factor of the product; should be hypoallergenic and stable as addition to be waterproof; must not cause or facilitate allergic reactions to sunlight and should be a good moisturizer (provides an even tan and prevents the natural drying that occurs when exposed to the sun).
Tips before sun exposure
One of the main recommendations to consider is that you have to avoid the sun in the hours between 10 a.m. and 4 p.m. The sunscreen should always be applied 20 minutes before exposure and should be reapplied every two hours, when out of the water or sweat a lot.
When exposing to sunlight should not wear makeup. In summer it is advisable to always shave late afternoon and not making any dermoaesthetic treatment as peelings, pulsed light, etc.
Also, do not use products for acne, anti-aging, whitening or refreshers for skin without consulting the dermatologist. Many of them have medication incompatible with sun exposure. It should also be consulted on oral medications, as some are sensitizers to sunlight and can cause burns.