Many people think sunscreen is only for the beach — but that’s a myth. Sunscreen should be part of your daily routine, whether you’re indoors or outdoors. UV rays can penetrate through clouds and windows, causing premature aging and even skin cancer. Choose a broad-spectrum sunscreen with SPF 30 or higher and reapply every two hours if you’re in the sun. People with darker skin also need sunscreen — melanin offers some protection but not enough to prevent long-term damage. Protecting your skin from the sun is one of the best anti-aging and health investments you can make.