There are certain relatives of grapefruit that we call pummelo, some of which are very, very low or have no furanocoumarins in them at all.
“葡萄柚也是有亲戚的如我们所知的“文旦”，但它们含有的呋喃并香豆素量很少，甚至没有。”
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The tangy fruits contain compounds called furanocoumarins, which can dangerously increase the effective dosage of some blood pressure and heart medications.