Which ingredient is commonly found in sunscreens to provide sun protection?

Zinc oxide and titanium dioxide are physical (or mineral) sunscreens that work by creating a barrier on the skin's surface to reflect and scatter UV radiation. These ingredients are effective across a broad spectrum of UV rays, providing protection against both UVA and UVB radiation. They are often favored in formulations for their gentle nature, making them suitable for sensitive skin types, and are also known for their stability within sunscreen formulations.

In contrast, hyaluronic acid is primarily a hydrating ingredient, salicylic acid is typically used for its acne-fighting properties, and collagen is a protein that supports skin structure but does not provide any sun protection. The inclusion of zinc oxide or titanium dioxide in sunscreens is critical because they actively contribute to guarding the skin against the harmful effects of sun exposure, making them essential components in effective sun protection products.