Sunscreen is often treated as the final, slightly inconvenient step in a skincare routine—the product we apply when it is sunny, when we are going to the beach, or when someone reminds us. In reality, sunscreen is one of the most important products you can use consistently. You may invest in professional treatments, medical-grade skincare, retinol, vitamin C, brightening products and growth factors, but without adequate daily sun protection, your skin is continually exposed t