juice becomes bitter on standing Some grapefruit phenolic compounds turn out to interfere with our metabolism of certain drugs, cause the drugs to persist longer in the body, and thus cause the equivalent of an overdose, so medicine labels sometimes warn against consuming grapefruit or its juice along with the medicine (These same phenolics are now being developed into activity-boosting drug ingredients.) Grapefruits have an especially complex aroma, which includes meaty and musky sulfur compounds Lime Limes are the most acidic of the citrus fruits, as much as 8% of their weight coming from citric acid The small, seedy Mexican or Key lime, C aurantifolia, is the standard sour citrus fruit in the tropics, where lemons don’t grow well In western Asia it’s sun-dried whole, then ground and used as an aromatic, somewhat musty acidifier The larger, seedless, more cold-tolerant Persian or Tahiti or Bearss lime, C latifolia, may be a hybrid between the true lime and citron, and is more common in the United States and Europe Despite the general impression that limes are characteristically “lime-green,” both turn pale yellow when fully ripe They owe their distinctive limeness to pine, floral, and spicy aroma notes (from terpenes) Lemon Lemons may have originated as a twostep hybrid, the first (citron crossed with lime) arising in the area of northwest India and Pakistan, the second ([citron crossed with lime] crossed with pummelo) in the Middle East Lemons arrived in the Mediterranean around 100 CE, were planted in orchards in Moorish Spain by 400, and are now mainly cultivated in subtropical regions They’re valued for their acidity, often 5% of the juice, and their fresh, bright aroma, which is the base for many popular fresh and bottled drinks There are many varieties of true ... Moorish Spain by 400, and are now mainly cultivated in subtropical regions They’re valued for their acidity, often 5% of the juice, and their fresh, bright aroma, which is the base for many popular fresh and bottled... Lemon Lemons may have originated as a twostep hybrid, the first (citron crossed with lime) arising in the area of northwest India and Pakistan, the second ([ citron crossed with lime] crossed with pummelo) in the Middle East Lemons arrived in the Mediterranean around 100 CE, were planted in orchards in... lime, C latifolia, may be a hybrid between the true lime and citron, and is more common in the United States and Europe Despite the general impression that limes are characteristically “lime-green,” both turn pale