Sunscreen, the unsung hero of skincare, is a formidable barrier against the harmful effects of the sun’s rays. From preventing sunburns to reducing the risk of skin cancer, its importance in our daily routine cannot be overstated. Let’s delve deeper into the world of sunscreen, exploring its significance, composition, and tips for effective usage.
The sun emits electromagnetic radiations of different wavelengths. Out of various wavelengths, mainly ultraviolet rays, visible light, and infrared radiations penetrate the skin and cause different effects. Ultraviolet radiations consist of UVC, UVB & UVA rays.
UVC rays are filtered off by different layers of the atmosphere. UVB rays are responsible for sunburns, while UVA rays cause premature aging and skin cancers. Visible rays more so blue light is responsible for causing hyperpigmentation in Indian skin.
Infrared radiation does lead to photoaging, aging, and skin cancers. Sunscreen acts as a shield, either absorbing or reflecting these harmful rays and thus safeguarding the skin. Sunscreens typically contain active ingredients that protect against UV radiation.
These ingredients fall into two categories: chemical and physical (mineral) filters. Chemical filters, such as oxybenzone and avobenzone, work by absorbing UV radiation and converting it into heat. These are again of three types UVA filters, UVB filters, and hybrid filters which protect you against both UVA & UVB rays.
On the other hand, physical filters, like zinc ox.