IS THERE any fruit more useful than a lemon? The citric acid in its juice can provide a touch of sharpness that improves a vast range of dishes.The fragrant oil concentrated in the peel of lemons has an aroma so appealing that we add it to cleaning products.It is also a good source of vitamin C: once its power to prevent scurvy was discovered in the 1750s,it led to a boom in demand for lemons.
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