Are there dangerous nanoparticles in sunscreen?

Nanoparticles in sunscreen, especially titanium dioxide (TiO2) and zinc oxide (ZnO), are often used for their effective UV protection. However, there are some concerns about the safety of these nanoparticles.

There are concerns that nanoparticles can penetrate the skin and enter the bloodstream, potentially causing harmful effects on the body. Some studies suggest that nanoparticles can generate reactive oxygen species under the influence of UV radiation, which can cause cellular damage. Nanoparticles can enter the environment and have potentially harmful effects on aquatic ecosystems.

However, scientific studies show that most titanium dioxide and zinc oxide nanoparticles in sunscreens do not penetrate deeply into the skin, especially when the skin is intact. They usually remain on the top layer of the skin (stratum corneum) and form a protective layer against UV radiation.

Although the research is generally reassuring, scientists continue to study the possible long-term effects of nanoparticles. It is always advisable to use sunscreens from reputable brands that adhere to safety standards and guidelines.

Source: https://www.sciencedirect.com/science/article/abs/pii/S0045653523029727

Author: Prof. Dr. Dirk Devroey - Latest update: 2022-02-22 - Copyright: Clinifacts 2024