on November 25, 2018, 16:18
Washington. [USA]November 25 (ANI): Applying sunscreen products to your body can be beneficial to your skin, but its nanoparticles can also adversely affect your skin.
A new study, led by researchers at the University of Queensland and the University of South Australia, provides the first direct evidence that zinc oxide nanoparticles used in sunscreen products do not penetrate the skin nor cause cellular toxicity after multiple applications.
Research published in the Journal of Investigative Dermatology refutes widespread claims and growing consumer beliefs about the safety of nanoparticle-based sunscreen products.
Researchers have reported that the myth of sunscreen toxicity has been preserved since earlier animal studies have found a much higher absorption of sunscreen products containing zinc than in human studies.
"There were concerns that these zinc oxide nanoparticles could be absorbed into the epidermis, with toxic consequences, including DNA damage," said Michael Roberts, lead researcher.
The link with toxicity was raised by consumers, raising fears that people could reduce the use of sunscreens, echoed by the National Cancer Council in 2017, showing a decline in the number of people who thought it safe to use sunscreens every day.
Roberts and his classmates studied the safety of multiple uses of zinc oxide nanoparticles applied to five volunteers aged 20-30. Volunteers apply ZnO nanoparticles every hour for six hours for five consecutive days.
Using excellent imaging methods, scientists have found that nanoparticles remain in the skin's superficial layers and do not cause any cellular damage.
"We hope these findings help improve consumer confidence in these products and will lead to better protection from the sun." The terrible effects of skin cancer and skin damage caused by prolonged exposure to sunlight are many greater than any toxicity caused by approved sunscreens, "Roberts concluded.