Regardless of how thoroughly you apply your sunscreen, when it comes to activities in the sun, or even just perspiring by the pool, sweat can cause your sun protection to slide right off, leaving your skin exposed to potentially damaging UV rays. Why is this, and what's the solution?
Why sweat is bad news for sunscreen
When you apply your sunscreen, it forms a protective layer over the skin's epidermis, the top layer of the skin. However, when we are hot and/or exercising, our body produces sweat (a mixture of water, sodium and other substances*) in order to cool us down. This sweat evaporates off the surface of the skin, taking with it our sunscreen...
La Roche-Posay recommendsAnthelios Hydrating Body Lotion SPF30
Because sunscreens are composed of liquid chemical compounds or a fine mineral powder, they do not adhere well to the skin, and come off easily when the skin sweats. La Roche-Posay, however, uses a tailored formula that creates a sweat-resistant moisturising layer over the skin that also minimises that familiar stinging sensation when sweat gets into the eyes.