It’s a huge comparison study and the results might surprise you. The Environmental Working Group (EWG) looked at 952 sunscreens that are widely available in the US and analysed both the safety of the ingredients and the effectiveness of the products. Only 15% made it to the recommended list.
(EWG) … found that 4 out of 5 sunscreen products offer inadequate protection from the sun, or contain ingredients with significant safety concerns. Leading brands were the worst offenders: None of market leader Coppertone’s 41 sunscreen products met EWG’s criteria for safety and effectiveness, and only 1 of 103 products from Banana Boat and Neutrogena, the second- and third-largest manufacturers, are recommended by EWG.