The primary risks of not using sunscreen include accelerated skin aging, such as wrinkles, dark spots, and uneven skin tone, as well as an increased likelihood of skin cancer due to prolonged UV exposure. Mineral sunscreens mitigate these risks by providing a physical barrier against UV rays. They are particularly beneficial for individuals with sensitive skin or those concerned about the environmental impact of chemical sunscreens. However, users should be aware that water-resistant formulations may require frequent reapplication, especially during swimming or sweating, to maintain effectiveness.