The citrus fruits, comprising the species oranges, mandarins, grapefruits and lemons, are currently collectively the most important group in terms of production worldwide. Citrus fruit is grown mainly in tropical and subtropical regions of the world. Today, Brazil is the largest producer of oranges and Japan of mandarins. Spain, Italy and Mexico lead in the production of lemon and limes, while the USA produce the largest quantity of grapefruit.
Citrus fruits are rich in vitamins, especially vitamin C. Its mild acid and bitter taste is good for the digestion and blood circulation. Citrus fruits are either consumed fresh or processed. The citrus peel is rich in pectin which is used in the production of jellies, marmalades, sweets, jams and pharmaceutical preparations.
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