Chemicals in sunscreen

Some advocacy groups claim that certain chemicals in sunscreens are harmful and may increase your risk of developing cancer. One of these chemicals is oxybenzone (sometimes called benzophenone-3). It is used in sunscreens because it can absorb both UVA and UVB rays and protect the skin from sun damage.

Sunscreen and cancer
A small number of studies have shown that oxybenzone can cause minor changes to cells in basic laboratory studies – but there is currently no evidence linking it to cancer.

There have also been some studies that suggest people who use sunscreen have a higher risk of developing skin cancer compared to people who do not use sunscreen. Scientists don’t think this increased risk is caused by any chemical – it comes from the fact that people who use sunscreen spend more time in the sun than people who don’t. Also, these people may not be applying sunscreen properly. Scientists are also looking at whether people who use sunscreen have lower vitamin D levels, which may increase the risk of developing cancer.

Canadian Cancer Society perspective
Given what we know so far, we aren’t concerned about oxybenzone in sunscreen. The research on this chemical is limited, and so far no animal or human studies suggest that it might cause cancer. The Society will continue to watch for any research in this area, and we will also track recommendations for sunscreen use by other regulatory agencies that protect your health and the environment.

Staying out of the sun is still the best way to reduce your risk of developing skin cancer. Protect yourself when the sun is at its strongest, cover your skin and eyes with clothing, a hat and sunglasses, use a sunscreen with an SPF 15 or higher and avoid indoor tanning.

More information on cancer.ca 
Sun and UV