SPF Doesn't Mean What You Think It Means

The video explains SPF (Sun Protection Factor), highlighting its limitations and how it only measures UVB protection, not UVA. It discusses the flawed testing methods using human volunteers and the real-world implications of these tests. The video suggests that consistent sunscreen use, even with low SPF, reduces skin cancer risk. Future improvements in SPF testing include using robots and in vitro methods for more accurate results.

What new insight or understanding did you gain from this video?