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You are what you eat: Microplastics in the feces of young men living in Beijing

Zhang, Na, Li, Yi Bin, He, Hai Rong, Zhang, Jian Fen, Ma, Guan Sheng·2021·Science of The Total Environment

Abstract

PURPOSE Microplastics have been widely detected in the environment and marine organisms. However, few studies have investigated the presence of microplastics in humans. This preliminary study identified and quantified the microplastic content in human feces. METHODS A total of 26 young male students aged 18-25 years were recruited from Beijing, China. A self-administered 7-day 24-h fluid intake record was used to document fluid intake, and food intake was recorded for 3 days. Feces were collected by participants using a sterile fecal collector. Microplastics in the remaining fecal residues were measured and identified using fourier transform infrared micro-spectroscopy. RESULTS Eventually, twenty-four participants completed the study. The fecal samples of 23 (95.8%) participants tested positive for microplastics. In these 23 samples, the abundance of microplastics varied from 1 particle/g to 36 particles/g (size 20 to 800 μm). The summed mass of all microplastic particles per participant ranged from 0.01 to 14.6 mg. Qualitative analysis of the microplastics indicated the presence of one to eight types of microplastics in each sample, with polypropylene (PP) being the most abundant; it was found in 95.8% of fecal samples. We examined associations between water intake habits and the abundance of microplastics in their feces. A moderate correlation was observed between packaged water and beverage intake and microplastic abundance in feces (r = 0.445, P = 0.029). CONCLUSION Various types of microplastics were detected in human feces, with PP being found in the highest proportion. There may be an association between water intake habits and microplastic abundance in feces.

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Metadata

Authors
Zhang, N., Li, Y. B., He, H. R., Zhang, J. F., & Ma, G. S.
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2021-05
Volume
767
Pages
144345
ISSN
0048-9697 (ISSN-L)
OpenAlex
W3117156463
Cited by
519
References
7
FWCI
10.96
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: You are what you eat: Microplastics in the feces of young men living in Beijing. https://app.cochat.ai/papers/10.1016/j.scitotenv.2020.144345
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Zhang, N., Li, Y. B., He, H. R., Zhang, J. F., & Ma, G. S. (2021). You are what you eat: Microplastics in the feces of young men living in Beijing. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2020.144345

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.