I can't remember where I first heard it but here's a few links. https://www.ewg.org/sunscreen/report/whats-wrong-with-high-spf/ https://www.ewg.org/sunscreen/r

I can't remember where I first heard it but here's a few links. https://www.ewg.org/sunscreen/report/whats-wrong-with-high-spf/ https://www.ewg.org/sunscreen/report/whats-wrong-with-high-s... https://www.mdacne.com/article/why-spf-30-is-better-than-spf-50?srsltid=AfmBOooBRryPui62355zhP9jxEnVvdYYD4VDW9zNpGPKGFCHO0FSW0L0 https://www.mdacne.com/article/why-spf-30-is-better-than-spf... This one (https://www.skincancer.org/blog/ask-the-expert-does-a-high-spf-protect-my-skin-better/ https://www.skincancer.org/blog/ask-the-expert-does-a-high-s...) doesn't directly say its better or worse, but alludes to the idea that when you combine the various factors there's definite cons to SPF 50. Potentially I slightly overstated, what I intended to say was "there's clear reasons why SPF 30 would be preferable in many/most cases". If you are a pale white person who is hiking through the Sahara with no hat SPF 50 might be the way to go.