Based on their results, the researchers estimate that the average adult ingests about 2,000 pieces of microplastic in salt per year. But, they write, that still only represents a fraction of the microplastics a person is likely to consume.

研究人员根据研究结果估计，一个成年人平均每年仅通过食盐就吃进约2000粒微塑料。不过，这可能只占一个人微塑料摄入量的很小一部分。

Previous research revealed that microplastics have also been found in tap water, mollusks, and both indoor and outdoor air. All together, those four pathways add up to an average 32,000 pieces of microplastic ingested per year per person. Inhaling microplastics in the air is by far the largest contributor—people ingest roughly 80% of the microplastics that enters their bodies through this route.

此前研究显示，自来水、软体动物和室内外空气中都含有微塑料。再加上食盐，一个成年人平均每年从以上4种途径中摄入3.2万粒微塑料。从空气中吸入微塑料目前来看占比最大，人们摄入的微塑料中有大约80%都是空气吸入的。

Given those other sources of exposure, microplastics in table salt amounts to about 6% of a person’s total microplastics ingestion, the researchers write.

研究人员写道，考虑到摄入微塑料的其他途径，人们从食盐中摄入的微塑料占到全部摄入量的大约6%。

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