What are the damages of high-factor sunscreen to the skin? What are the meanings of index 50 and 30

Sun protection also has an index, especially for sunscreens. What kind of damage does high-factor sun protection do to the skin? What is the meaning of SPF 30 and 50?

High-factor sunscreen damage to the skin

Irritating the skin. High-factor sunscreen contains more chemical substances, which will irritate the skin even if it is not sensitive skin! Unsafe ingredients that may cause skin cancer. According to recent discoveries in the United States, zinc oxide, an ingredient in sunscreen, will release harmful microparticle free radicals under sunlight, increasing the risk of skin cancer in humans. Therefore, sunscreen is not necessarily safe.

The significance of SPF 50 and 30

The SPF is a test index that measures the ability of sunscreen to defend against ultraviolet UVB in sunlight. It indicates the sun protection effectiveness of sunscreen products. Assuming that your skin starts to turn red after 10 minutes of sun exposure without applying sunscreen, a product with an SPF of 50 can protect your skin for 500 minutes, while a product with an SPF of 30 can protect your skin for 300 minutes.