Understanding your sunscreen may convince you to actually wear it.
Ask a Derm: Is Octocrylene an Effective SPF Ingredient?
Is sunscreen safe?
Why Other Countries Have Better Sunscreen - The Atlantic
Breakdown: Why you need to wear sunscreen, regardless of the time of year
How these ingredients make your sunscreen work
Science - Page 226
I heard of a recipe for natural homemade sunscreen. Do these work?
How these ingredients make your sunscreen work
The Problem With Sunscreen Isn't Its Ingredients—It's You