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Home NEWS Science News Chemistry

Take the burn out of sunscreen testing: Experts

Bioengineer by Bioengineer
July 14, 2022
in Chemistry
Reading Time: 6 mins read
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Exposing humans to ultraviolet radiation to test sunscreen effectiveness should be phased out, according to scientists and cancer experts.

The recommendation from the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Cancer Council Victoria and RMIT University is backed by research published in the journal Trends in Analytical Chemistry.

The paper reviews sunscreen ingredients, regulations and testing globally, and proposes a roadmap for the development of reproducible human-free sunscreen testing.

Testing sunscreens on humans is the current international standard to rate UV protection performance. This testing involves volunteers wearing a sunscreen and being exposed to artificial solar UV to measure the performance by the time taken for sunburn to occur.

However, ARPANSA Chief Radiation Health Scientist Dr Rick Tinker said this has ethical challenges as it exposes people to cancer-causing UV radiation.

“Sunscreens are an important part of sun protection and preventing serious sun damage to people – 2 in 3 Australians will develop skin cancer by the age of 70 – but we shouldn’t be risking people’s long-term health to test the effectiveness of sunscreens,” Tinker said.

Human-free sunscreen testing technology is in development

A team led by Professor Vipul Bansal, Director of RMIT’s Sir Ian Potter NanoBioSensing Facility, has already developed a prototype sensor that changes colour when exposed to UV radiation that they say could be customised for human-free sunscreen testing by mimicking the skin. 

“What excites me the most is that access to this new method will allow sunscreen manufacturers to rapidly innovate new and better sunscreens, which are currently limited due to time and cost constraints involved with human testing,” Bansal said.

Bansal’s team – including Dr Wenyue Zou, Associate Professor Sylvia Urban and Associate Professor Rajesh Ramanathan – are working with ARPANSA to develop the required human-free sunscreen testing methods and protocols within this decade.

Bansal said sunscreen testing was just one of many potential applications for nanosensor technologies, which could also be used to detect a wide range of diseases and contaminants.

SunSmart advice remains unchanged

ARPANSA and the Cancer Council Victoria work in partnership to promote sun safety and skin cancer prevention.

Head of Prevention at Cancer Council Victoria, Craig Sinclair, said data from the 2020 Victorian Cancer Registry reported 2,582 new cases of melanoma across the state.

“Skin cancer is one of the most preventable cancers. Using good sun protection when the UV level is three or above can lower your skin cancer risk,” he said.  

“Research shows that when applied correctly, sunscreen is effective in preventing skin cancer, including melanoma, the deadliest form of skin cancer.

“In Australia’s harsh UV environment, sunscreen is an essential form of sun protection.

“Cancer Council Victoria welcomes all innovation that both works to reduce the burden of skin cancer and brings efficiencies in the manufacturing of sun protection products.”

ARPANSA and the Cancer Council recommend using the five S’s of sun safety – Slip, Slop, Slap, Seek, Slide – when the UV level is 3 or above:

Woman wearing sunscreen

Credit: Cancer Council Australia

Exposing humans to ultraviolet radiation to test sunscreen effectiveness should be phased out, according to scientists and cancer experts.

The recommendation from the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Cancer Council Victoria and RMIT University is backed by research published in the journal Trends in Analytical Chemistry.

The paper reviews sunscreen ingredients, regulations and testing globally, and proposes a roadmap for the development of reproducible human-free sunscreen testing.

Testing sunscreens on humans is the current international standard to rate UV protection performance. This testing involves volunteers wearing a sunscreen and being exposed to artificial solar UV to measure the performance by the time taken for sunburn to occur.

However, ARPANSA Chief Radiation Health Scientist Dr Rick Tinker said this has ethical challenges as it exposes people to cancer-causing UV radiation.

“Sunscreens are an important part of sun protection and preventing serious sun damage to people – 2 in 3 Australians will develop skin cancer by the age of 70 – but we shouldn’t be risking people’s long-term health to test the effectiveness of sunscreens,” Tinker said.

Human-free sunscreen testing technology is in development

A team led by Professor Vipul Bansal, Director of RMIT’s Sir Ian Potter NanoBioSensing Facility, has already developed a prototype sensor that changes colour when exposed to UV radiation that they say could be customised for human-free sunscreen testing by mimicking the skin. 

“What excites me the most is that access to this new method will allow sunscreen manufacturers to rapidly innovate new and better sunscreens, which are currently limited due to time and cost constraints involved with human testing,” Bansal said.

Bansal’s team – including Dr Wenyue Zou, Associate Professor Sylvia Urban and Associate Professor Rajesh Ramanathan – are working with ARPANSA to develop the required human-free sunscreen testing methods and protocols within this decade.

Bansal said sunscreen testing was just one of many potential applications for nanosensor technologies, which could also be used to detect a wide range of diseases and contaminants.

SunSmart advice remains unchanged

ARPANSA and the Cancer Council Victoria work in partnership to promote sun safety and skin cancer prevention.

Head of Prevention at Cancer Council Victoria, Craig Sinclair, said data from the 2020 Victorian Cancer Registry reported 2,582 new cases of melanoma across the state.

“Skin cancer is one of the most preventable cancers. Using good sun protection when the UV level is three or above can lower your skin cancer risk,” he said.  

“Research shows that when applied correctly, sunscreen is effective in preventing skin cancer, including melanoma, the deadliest form of skin cancer.

“In Australia’s harsh UV environment, sunscreen is an essential form of sun protection.

“Cancer Council Victoria welcomes all innovation that both works to reduce the burden of skin cancer and brings efficiencies in the manufacturing of sun protection products.”

ARPANSA and the Cancer Council recommend using the five S’s of sun safety – Slip, Slop, Slap, Seek, Slide – when the UV level is 3 or above:

  • slip on some sun-protective clothing – make sure you cover as much skin as possible
  • slop on broad spectrum, water resistant SPF30 or higher sunscreen – put it on 20 minutes before you go outdoors and reapply every two hours afterwards
  • slap on a hat – broad brim or legionnaire style to protect your face, head, neck and ears
  • seek shade
  • slide on some sunglasses – make sure they meet Australian Standards.

‘Sunscreen testing: A critical perspective and future roadmap’, with co-authors Professor Vipul Bansal, Associate Professor Sylvia Urban, Dr Wenyue Zou and Associate Professor Rajesh Ramanathan from RMIT, Dr Kerryn King and Dr Rick Tinker from ARPANSA and Adjunct Associate Professor Craig Sinclair from Cancer Council Victoria, is published in the journal Trends in Analytical Chemistry (DOI: 10.1016/j.trac.2022.116724).

IMAGES AND VIDEO FOR MEDIA USE

  • Here is a link to images related to the story that you are free to use with the appropriate attribution (suggested captions and credit information in the file names):
  • https://cloudstor.aarnet.edu.au/plus/s/7F6ENuwCDCLw3tI 
  • Here is some overlay footage of the RMIT team with the UV sensor device: https://spaces.hightail.com/space/eVJNa8oNTK   
  • Here is some overlay footage from the RMIT research labs: https://spaces.hightail.com/space/8z0Vdj4Wnf

MEDIA CONTACTS:

  • For interviews with RMIT researchers, contact Will Wright on +61 417 510 735 or at [email protected]  
  • For interviews with Dr Stuart Henderson, Assistant Director, UVR Exposure Assessment, at the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), contact David Sibenaler on +61 400 953 156 or at [email protected]
  • For interviews with Craig Sinclair, Head of Prevention at Cancer Council Victoria, contact Emily Robertson on +61 478 818 272 or at [email protected]


Journal

TrAC Trends in Analytical Chemistry

DOI

10.1016/j.trac.2022.116724

Method of Research

Systematic review

Subject of Research

Not applicable

Article Title

Sunscreen testing: A critical perspective and future roadmap

Article Publication Date

22-Jun-2022

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