Sunscreen ingredients are essential for protecting your skin from harmful ultraviolet (UV) rays. There are two main types of ingredients: physical and chemical. Physical ingredients, like zinc oxide and titanium dioxide, sit on the skin's surface and reflect UV rays. They are often recommended for sensitive skin because they are less likely to cause irritation. On the other hand, chemical ingredients, such as oxybenzone and avobenzone, absorb UV rays and convert them into heat, which is then released from the skin. While both types are effective, it's important to choose a sunscreen that suits your skin type and offers broad-spectrum protection against both UVA and UVB rays.