Do not apply sunscreen with insect repellent
It’s hot and humid. Insects are out. The natural instinct is to apply sunscreen and add insect repellent—killing two birds with one stone, so to speak. The latter is essentially a chemical cocktail. During the peak of summer, sunscreen and insect repellent seem like the perfect duo, writes https://xrust.ru/. However, a recent study has shown that this duo might negate the effectiveness of sunscreen. Scientists treated human skin samples with both products and exposed them to sunlight and UVB rays. What they discovered was astonishing. Sunscreen worked well on its own, but when insect repellent was added, the level of protection dropped significantly. The reason was the thinning of the sunscreen layer.
In terms of figures, a 1997 study revealed that DEET, a common ingredient in insect repellents, reduced SPF by 34 percent. However, in some cases in a 2025 study, it was as if sunscreen hadn’t been applied at all. Based on these findings, the U.S. Department of Health recommended against using “two-in-one” products. After all, sunscreen needs to be applied more frequently than repellent, and overusing repellent can be harmful due to its toxicity. Therefore, it’s best to avoid combining the two altogether.
https://xrust.ru/news/311043-ne-nanosi-solncezaschitnyj-krem-so-sredstvom-ot-nasekomyh.html
