While SPF 100 blocks out 99% of UVB rays, experts generally agree that it's not significantly better than SPF 30 or 50, which block 97% and 98% respectively. The small difference in protection doesn't justify the potential downsides of using SPF 100.
Here's why:
- False Sense of Security: High SPF sunscreens can make people feel overly confident about their sun protection, leading them to spend more time in the sun without reapplying.
- Limited Availability: Many sunscreens with SPF 100 have a thicker consistency and can be harder to apply evenly, potentially leading to missed spots.
- Overly Expensive: Higher SPF sunscreens tend to be more expensive, making them a less cost-effective option compared to SPF 30 or 50.
In general, SPF 30 or 50 offers adequate protection when applied correctly and reapplied every two hours. Focusing on consistent and proper application is more important than chasing a higher SPF number.
