Developing nanoparticles capable of adhering to skin has led a team of scientists from Yale University to come up with a new type of sunscreen, and it’s one that they claim is safer, because it lacks chemicals that can penetrate the dermis and cause potential health issues.

The authors, who published their findings in Monday’s edition of the journal Nature Materials, explained that while most commercial sunblocks do a good job of providing protection from the sun’s rays, they can go beneath the surface and enter the blood stream. If and when they do, they could potentially even help cause the very skin cancers they intent to prevent.

Dr. Mark Saltzman, the Goizueta Foundation Professor of Biomedical Engineering at Yale, and his colleagues have developed an alternative that is made from bioadhesive nanoparticles. Their sunscreen remains on the surface of the skin and does not enter the bloodstream, as the particles used to make it are large enough to prevent entry through the surface of the epidermis.

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