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 does SPF stand for and what does it measure?

Explain the difference between UVB and UVA rays in relation to sunscreen.

Why is it important to use broad spectrum sunscreen?

What are some flaws in the current testing methods for SPF ratings?

What are some potential improvements being researched for SPF testing?