Sunscreen: Myths and Facts About Sun Protection

During the summer, sunscreen is essential, but there are many myths about its use. Let's see what's true.

What does SPF 50 mean? The SPF indicates the ratio of ultraviolet (UV) radiation that would cause a burn with sunscreen, to the radiation that would cause a burn without sunscreen. An SPF 25 blocks 96% of UV radiation, while an SPF 50 blocks 98%.

Sunscreen should be reapplied regularly, at least every two hours and after swimming or sweating. Look for a high SPF and "broad spectrum" protection.

UVA and UVB: Both UVA and UVB rays can cause skin cancer. Broad-spectrum sunscreens block both types of radiation.

Sunburn on cloudy days: You can get sunburn even on a cloudy day, as clouds do not always block UV radiation.

Year-round use? Generally, if the UV index is below two, no additional protective measures are needed. However, in cases such as snow cover, protection is necessary.

Vitamin D: Regular sunscreen use does not necessarily cause vitamin D deficiency.

Sunscreen activation: Sunscreen does not need 20 minutes to "activate." It is effective immediately, but 15-20 minutes helps it dry and form a protective film.

Dark skin: Even people with darker skin should use sunscreen, as they can get sunburned and develop skin cancer.