October 1, 2012

More Evidence Shows Nanoparticles In Sunscreen Do No Harm

More research shows that nanoparticles in cosmetics, including sunscreen, do not penetrate the skin’s surface. This study, announced today, again contradicts the unscientific claim long espoused by anti-nanotech activists — and repeated often by an unquestioning media — that nanoparticles in sunscreen penetrate the top layers of skin and could cause harm.

As I wrote in my Sept. 14 NanoBot post — “Nanotech In Sunscreen: What’s The Harm?”  — this assertion has been repeated so often that it is often mistaken for fact.

Now, according to a news releases from the University of Bath in the UK, “even when the skin sample had been partially compromised by stripping the outer layers with adhesive tape, the nanoparticles did not penetrate the skin’s outer layer, known as the stratum corneum.”

Professor Richard Guy from the university’s Department of Pharmacy & Pharmacology, supplies us with more-direct, unambiguous language.

“So, while an unsuspecting consumer may draw the conclusion that nanoparticles in their skin creams, are ‘carrying’ an active ingredient deep into the skin, our research shows this is patently not the case,” Guy said in a news release.

The research was published in the Journal of Controlled Release.

Of course, facts have never been a strong part of anti-nanotech activists’ agendas, so I doubt this study will be cited in these groups’ own “research.”

Image Credit: Photos.com

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