Medical University of Vienna, Vienna, Austria (P.S., P.K., T.B., M.T., T.R.).
Environment Agency Austria, Vienna, Austria (S.K., B.L.).
Ann Intern Med. 2019 Oct 1;171(7):453-457. doi: 10.7326/M19-0618. Epub 2019 Sep 3.
Microplastics are ubiquitous in natural environments. Ingestion of microplastics has been described in marine organisms, whereby particles may enter the food chain.
To examine human feces for the presence of microplastics to determine whether humans involuntarily ingest them.
Prospective case series in which participants completed a food diary and sampled stool according to step-by-step instructions.
Europe and Asia.
Eight healthy volunteers aged 33 to 65 years.
After chemical digestion, Fourier-transform infrared microspectroscopy was used to analyze the presence and shape of 10 common types of microplastic in stool samples.
All 8 stool samples tested positive for microplastics. A median of 20 microplastics (50 to 500 µm in size) per 10 g of human stool were identified. Overall, 9 plastic types were detected, with polypropylene and polyethylene terephthalate being the most abundant.
There were few participants, and each provided only 1 sample. The origin and fate of microplastics in the gastrointestinal tract were not investigated.
Various microplastics were detected in human stool, suggesting inadvertent ingestion from different sources. Further research on the extent of microplastic intake and the potential effect on human health is needed.
None.
微塑料在自然环境中无处不在。海洋生物中已发现有摄入微塑料的情况，这些颗粒可能由此进入食物链。
检测人体粪便中是否存在微塑料，以确定人类是否会无意识地摄入它们。
前瞻性病例系列研究，参与者按照逐步说明完成食物日记并采集粪便样本。
欧洲和亚洲。
8 名年龄在 33 至 65 岁之间的健康志愿者。
经过化学消化后，傅里叶变换红外微光谱法用于分析粪便样本中 10 种常见类型微塑料的存在和形状。
所有 8 个粪便样本均检测出微塑料阳性。每 10 克人粪便中鉴定出中位数为 20 个（尺寸为 50 至 500 微米）微塑料。总体而言，共检测到 9 种塑料类型，其中聚丙烯和聚对苯二甲酸乙二醇酯最为丰富。
参与者人数较少，每人仅提供 1 个样本。未研究胃肠道中微塑料的来源和命运。
在人类粪便中检测到各种微塑料，表明它们是从不同来源无意识摄入的。需要进一步研究微塑料摄入量的程度及其对人类健康的潜在影响。
无。
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