Nanomaterials in Cosmetic Products: the Challenges with regard to Current Legal Frameworks and Consumer Exposure

Nanotechnology-enabled cosmetic products (NCPs) have been accessible in the market for the last 30 years. More than 250 products have been commercialized in the global market potentially exposing two billion people. These products are present in all formulations including creams, powders, lotions, and sprays. These involve contact with all body especially skin and mucosae; other tissues like airways and gastrointestinal tract can be reached by accidental exposure. Due to the size, NCPs exhibit an increased surface area volume ratio and biodistribution that potentially augments their reactivity compared with bulk materials, which raises concerns for consumer's safety. Consumers are attracted by the novel properties and functions of nano-enabled products but expose to technologies where no legal frameworks have been implemented to prevent potential side effects. Here, we review the current gaps between the commercialization process of NCPs and the regulatory frameworks to assess these products in USA, Europe, Japan, and Latin America prior and after commercialization. We identify the requirements for a proper assessment of the potential hazard of nanomaterials (NMs) in cosmetics considering the nanomaterial properties.