The chemical makeup of fruit
Fruits are made of thousands of chemicals. Some of the main groups of chemicals found in fruits are: carbohydrates, nutritive compounds and non-nutrient phytochemicals, including flavanoids and polyphenols.
http://news.bbc.co.uk/1/hi/health/800628.stm
1) Carbohydrates -  Carbohydrates are chemical compounds that include sugars, starches, cellulose and other related compounds. Carbohydrates in food supply energy and are used in the production of fat.
        There are three main groups of carboydrates: Monosaccharides, Disaccharides and Polysaccharides. Monosaccharides are the carbohydrates  most comonly found in fruits. Theses carbohydrates include
fructose and glucose.
2) Nutritive Compounds -  Some common nutritive compounds found in fruit are, proteins, lipids and fibers. Also found in fruits are a wide variety of minerals including: calcium, iron, potassium, sodium, zinc and phosphorus. There are also a wide variety of vitimins found in fruit including: vitamin C, riboflavin, vitamin B and vitamins A and E. There are also a wide variety of amino acids found in  fruits.
3) Phytochemicals - Phytochemicals are non-nutrient chemicals containing protective, disease-preventing compounds. Two of the main phytochemicals found in fruit are polyphenols and flavanoids. Phytochemicals contribute to the color, taste and flavor of many foods.
For health benefeits of chemicals in fruit click here.
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