What is the role of sunscreen with SPF 30?

The role of sunscreen with SPF 30 is primarily to protect against UVB rays. Sunscreens with a Sun Protection Factor (SPF) indicate the level of protection they provide against the sun's harmful ultraviolet B (UVB) radiation, which is responsible for causing sunburn and contributes to the development of skin cancer. An SPF of 30 means that the sunscreen can block approximately 97% of UVB rays, offering significant protection for the skin when applied properly.

While hydration, pigmentation reduction, and prevention of skin aging are important aspects of skincare, these functions are not the primary purpose of sunscreen. Hydration is usually addressed through moisturizers, pigmentation can be managed with specific treatments or products targeted towards correcting discoloration, and skincare aimed at preventing aging typically includes antioxidants and other active ingredients that promote skin health. Therefore, the focus of SPF 30 sunscreen is on its protective qualities against UVB rays.