Here's a good recent overview of reasons to doubt the efficacy of sunscreen against fatal skin cancers: https://www.outsideonline.com/2380751/sunscreen-sun-exp

Here's a good recent overview of reasons to doubt the efficacy of sunscreen against fatal skin cancers: https://www.outsideonline.com/2380751/sunscreen-sun-exposure-skin-cancer-science https://www.outsideonline.com/2380751/sunscreen-sun-exposure... (Most recently discussed on HN at https://news.ycombinator.com/item?id=23086211 https://news.ycombinator.com/item?id=23086211) Similar doubts have existed for decades – here's a 1993 variant reporting some of the trends that already didn't add up, back then: https://www.motherjones.com/politics/1993/05/melanoma-sunscreen-use/ https://www.motherjones.com/politics/1993/05/melanoma-sunscr... Another branch reply provides more sources about sunscreen chemicals & sun-longevity correlations: https://news.ycombinator.com/item?id=27520144 https://news.ycombinator.com/item?id=27520144