Sunblock protection refers to the ability of a sunblock or sunscreen to shield the skin from the harmful effects of ultraviolet (UV) radiation from the sun. UV radiation is classified into two types: UVA and UVB rays.
UVA Rays: UVA rays penetrate the deeper layers of the skin and contribute to premature aging, wrinkles, and skin cancer. They are present throughout the day and can penetrate through clouds and glass.
UVB Rays: UVB rays primarily affect the outer layer of the skin and are the primary cause of sunburn and skin cancer. UVB rays are more intense during midday and in the summer months.
Sunblock protection is typically measured and indicated by the Sun Protection Factor (SPF) and the term “broad-spectrum.”
SPF: SPF indicates the level of protection a sunblock provides against UVB rays. For example, SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%. Higher SPF values provide more protection but do not block 100% of UVB rays.
Broad-Spectrum: Broad-spectrum sunblocks protect against both UVA and UVB rays. It’s important to choose sunblocks labeled as broad-spectrum to ensure comprehensive protection against all types of UV radiation.
Effective sunblock protection involves:
Applying sunblock generously to all exposed skin areas at least 15-30 minutes before sun exposure.
Reapplying sunblock every two hours or immediately after swimming or sweating.
Using sunblocks with water resistance if swimming or participating in water activities.
Seeking shade, wearing protective clothing, hats, and sunglasses, and avoiding peak sun hours between 10 a.m. and 4 p.m. as additional sun-safe practices.Choosing sunblocks with safe and effective active ingredients such as zinc oxide, titanium dioxide, avobenzone, octinoxate, and oxybenzone.
Regular use of sunblock with proper application and sun-safe practices helps protect the skin from sunburn, premature aging, sunspots, and skin cancer caused by UV radiation.
