The best SPF (Sun Protection Factor) for sunscreen is generally considered to be 30 or higher. SPF 30 blocks 97% of the sun's UVB rays, while SPF 50 blocks 98%. Dermatologists recommend using a sunscreen with an SPF of at least 30, as it provides effective protection against UVB rays

. It's important to note that higher SPF values do not provide significantly more protection and can create a false sense of security, leading to longer sun exposure, which can be harmful to the skin

. Therefore, it's essential to apply sunscreen with at least SPF 30 and reapply it regularly, regardless of the SPF value, and to use other sun protection methods as well