Determining the cosmetics usage patterns of consumers for exposure assessment in China.

Accurately understanding the usage patterns of cosmetics is crucial for realistic exposure assessment. However, reference values for consumer exposure to cosmetics in China have yet to be established. A continuous survey was conducted in Guangdong Province to address this deficiency. Among 1320 potential participants, 268 men and 412 women completed the survey. The survey used a weighing method to accurately obtain the actual usage amounts of cosmetics by consumers, along with photographic documentation to ensure the accuracy and completeness of the information. Based on the participants' cosmetic usage, exposure factors for a total of 20 types of cosmetics were obtained. More than 60% of the participants reported the use of shower gel and shampoo. Face cleanser, shower gel, shampoo and conditioner were used at least once a day by ∼50% of the population. The amount of use of different cosmetics varies significantly due to individual usage habits. These data hold enlightening significance for initiating a nationwide survey on cosmetic exposure levels across China.