科学60秒:别把吃土的当怪人...
Researchers collected more than 480 reports from missionaries, plantation doctors, explorers and anthropologists. These included who was eating dirt and ___3___. Seems that dirt doesn’t offer much in the way of nutrition—but it may protect against toxins, pathogens and parasites.
Dirt is most commonly eaten by women in early stages of pregnancy and preadolescent children. Both are particularly at risk from pathogens and parasites. Also, people tend to eat dirt when they’re suffering from gastrointestinal distress. The distress probably doesn’t come from the dirt, which is usually clay found deep in the ground and that doesn’t ___4___ pathogens. Plus people often boil the clay before eating.
Scientists say more research is needed to confirm the hypothesis that dirt has health benefits. But they hope this offers evidence that eating dirt isn't, well, as ___5___ as it may seem.
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