Don't go swimming while wearing sunscreen - unless you want cancer.
A compound used in the protective lotions1
when it reacts with chlorine and ultraviolet rays, researchers found.
Avobenzone is considered the most popular sun-blocker in the world due to its ability to absorb sunlight at different wave lengths - preventing skin damage.
But Russian scientists suggest the UV-filtering compound forms cancer-causing toxins3
when exposed to a mixture of sun and chlorinated water.
Aldehydes, phenols and chlorinated acetyl benzenes were created in experiments simulating swimmers wearing sunscreen.
The latter two are considered extremely toxic and are strongly linked to deadly tumours4
, Lomonosov Moscow State University experts say.
While a study earlier this year hinted that aldehydes can raise the risk of cancer as they interfere6
with the body's natural repair mechanism7