Investigation of heavy metal risks in liquid foundation products

In this study, 69 batches of liquid foundation products were tested for heavy metal risk. Liquid foundation products are highly regarded by consumers for their ability to conceal blemishes, enhance facial features, and create an even skin tone. In recent years, there have been sporadic reports of heavy metals detected in air cushion products. This research aims to ensure ingredient transparency, comply with the Chinese Safety and Technical Standards for Cosmetics (2015), enhance consumer trust in products and protect consumer health; Methods: This study utilizes inductively coupled plasma mass spectrometry (ICP-MS) to analyze the heavy metal content. The study also investigated the primary sources of risk associated with thallium (Tl), a potent neurotoxin. The concentrations of some detected prohibited components are within the safety standard (the Chinese Safety and Technical Standards for Cosmetics (2015) range. However, Tl was found in 2 batches of liquid foundation products that were greater than the reference limits. This study revealed a high detection rate of thallium in samples containing zinc oxide. Further exploration suggests this may be related to the zinc oxide production process. It is suggested that manufacturers strengthen raw material oversight, adopt advanced Tl removal technologies, and ensure product safety through third-party testing. Additionally, establishing a health risk model for thallium based on exposure levels is imperative, along with refining safety thresholds for vulnerable populations, such as pregnant women and children.