What is the minimum recommended SPF for sun protection?

The minimum recommended SPF for sun protection is often considered to be 30. An SPF of 30 blocks about 97% of the sun's harmful UVB rays, making it a more effective choice for most individuals, especially during prolonged sun exposure. While a lower SPF, such as 15, does provide some protection and can be sufficient for short periods outdoors with minimal sun exposure, it does not offer the comprehensive protection that a higher SPF can provide. For individuals who will be spending considerable time in the sun or have lighter skin types that burn easily, SPF 30 or higher is advisable to minimize the risk of skin damage, aging, and skin cancer. Thus, while SPF 15 may be mentioned by some sources as a minimum, current recommendations lean toward a higher standard to ensure adequate protection for a wider range of skin types and conditions.