A sunscreen that uses DNA to act as a 'second skin' is on the horizon, potentially offering better protection from ultraviolet light throughout the day without the laborious task of constant re-application.

Scientists in the US used DNA samples taken from salmon to develop a product which gets better at shielding the skin from harmful UV exposure the longer it is in direct sunlight. It also helps lock in the moisture beneath the skin's surface – promising a longer-lasting tan.

The Concept

Instead of damaging our own skin's DNA (resulting in sunburn), the UV light instead only affects the alternative applied layer of salmon DNA. Dr Guy German, assistant professor of biomedical engineering at Binghampton university, where the research was conducted, explained:

'We thought, let's flip it. What happens instead if we actually used DNA as a sacrificial layer? So instead of damaging DNA within the skin, we damage a layer on top of the skin.'

In tests, the research team found that the thin, optically transparent crystalline DNA films that they had developed became better at absorbing UV light the more they were exposed to it. German added:

'If you translate that, it means to me that if you use this as a topical cream or sunscreen, the longer that you stay out on the beach, the better it gets at being a sunscreen.'

As it stands, current sunscreens need to be applied roughly 30 minutes before sun exposure and then reapplied every couple of hours throughout the day – unless you go swimming or sweat profusely, in which case you need to reapply more often. However, the development of this DNA film means that a single application would suffice for beachgoers, holidaymakers or anyone who spends a significant amount of time in the sun.

Other Uses

The potential of DNA films isn't just limited to sunscreen. The moisture-locking properties of such a product promises a potential treatment or prevention method for dry, flaky or pigmented skin, as well as injuries. Commenting on the versatility of the material, German said:

'Not only do we think this might have applications for sunscreen and moisturisers directly, but if it's optically transparent and prevents tissue damage from the sun and it's good at keeping the skin hydrated, we think this might be potentially exploitable as a wound covering for extreme environments.'

For now, however, the research is still in the early stages, and a lot more tests will have to be done before anything of this kind appears on the market. So, as far as summer 2017 is concerned, keep applying that sun lotion.

The research was published in the journal Scientific Reports.

From: ELLE UK