Why can sunscreen protect against sunshine?

We all know that if you leave the skin exposed to the sun, soon the skin will turn red, so it can be painful for a long time. People spend the day and night with the sea, the skin darkens because of the sun and wind. That is the phenomenon of skin aging before age as a result of the excessive tolerance of ultraviolet rays of sunlight.

Ultraviolet light has the ability to kill bacteria, but it also damages cut cells of the skin. If mild, red rashes, irritation, if severe, water blisters even darken and cause skin cancer.

In sunscreen, in addition to oil and water like other normal creams, adding sunscreen can reflect ultraviolet rays . The earliest manufactured sunscreen, containing solid powder like: oxidized zinc, talcum, flax, titanium oxidation. They all have effective ultraviolet sun protection.

Later, sunscreen has more UV absorbing material. They are complex organic substances capable of strongly absorbing ultraviolet rays. Like P.lamino bendoic acid numb ester. It can absorb 99% of ultraviolet rays shining on the skin. So it is ideal for sun protection.

Especially, it has been discovered that some plants, flowers and fruits contain some liquid capable of absorbing ultraviolet rays. For example, cucumber oil or aloe vera fluid can be added to cosmetics to be made into sunscreen, sunscreen and sunscreen. Those who work outdoors for a long time should apply sunscreen to protect their skin.