研究者的工作始于两年以前，当Misra博士，一个重度咖啡饮者，留下一杯未喝完的咖啡，第二天发现咖啡上面覆了一层油。

The researchers’ work began two years ago when Dr Misra, a heavy coffee drinker, left a cup unfinished and noticed the next day that the coffee was covered by a film of oil.

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高史博士在志愿者的食谱中补充了昆布茶，一种含有海带、鲜味丰富的茶饮。

Dr Sasano supplemented the diets of his volunteers with kombucha, an umami-rich infusion of kelp.

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