Yes, SPF 100 is real. It's a sun protection factor (SPF) rating that indicates a sunscreen blocks 99% of UVB rays, which cause sunburn. While SPF 100 offers slightly more protection than SPF 50 (which blocks 98% of UVB rays), the difference in protection is minimal.
Here's why SPF 100 might not be necessary:
- Limited Real-World Benefit: Real-world studies show that SPF 100 might not offer significantly more protection than SPF 50 when applied in typical conditions.
- Adequate Protection with SPF 30-50: SPF 30 to 50 is generally considered sufficient for most people to prevent sunburn, even those with sensitive skin.
- Focus on Proper Application: The most important factor in sun protection is consistent and proper application of sunscreen, regardless of the SPF.
Important Note: SPF only measures protection against UVB rays, not UVA rays, which cause premature aging and skin damage. Choose a sunscreen with broad-spectrum protection, meaning it protects against both UVA and UVB rays.
