They declare sunscreens with nanoparticles a safe means of sun protection
The American Academy of Dermatology (AAD) has declared the use of sunscreens with nanoparticles of titanium dioxide and zinc oxide as a safe protection against the harmful ultraviolet rays of the sun.
By protecting the skin from these rays, these sunscreens are very useful in the prevention of skin cancer. Moy, President of the Academy, reiterated the importance of using sun protection for the prevention of skin cancer and premature aging of the skin by effectively blocking UVA and UVB rays.
Sunscreens are composed of active drug ingredients that are capable of scattering, absorbing or reflecting ultraviolet light. Some press reports were skeptical about the use of sunscreens containing retinol palmitate and oxybenzone, and also about the application of nanotechnology in sunscreens. Dr. Moy confirmed that none of these substances are dangerous to health. He added that the use of nanotechnology helps add materials such as titanium dioxide and zinc oxide in the form of nanoparticles in sunscreens and makes them more effective at blocking UV rays.
Dr. Moy pointed out that although a wide use of nanotechnology in the medical field is currently under evaluation, the nanoparticles present in sunscreens are more effective at protecting from UV rays as they are small molecules that can cover a larger surface area of the skin compared to other larger particles. According to him, the outermost layer of the stratum corneum of the skin prevents nanoparticles from entering the sublayers, making the use of nanoparticles in sunscreen safe.