"The nanoparticles used in sunscreens provide important sun protection benefits, helping reduce the risk of skin cancer," said John Bailey, executive vice-president of science at CTFA. "These sunscreen ingredients have been used safely for many years and have been evaluated and approved by the FDA [US Food and Drug Administration] and independent scientists. They are transparent and aesthetically pleasing, and therefore encourage greater consumer use."

The CTFA says that the FDA concluded in 1996 that smaller, micronized particles of titanium dioxide are not new substances and that there is no evidence demonstrating that these micronized particles are unsafe.