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Glossary AB CD EF GH IJ KL MN OP QR ST UV WX YZ Carbohydrate The class of nutrients that consist of sugar molecules. These can be as individual molecules or as components of complex molecules. If absorbed, carbohydrates supply about 4 Calories per gram and have the highest conversion rate to usable energy (ATP). Carbohydrates are the primary fuel source for the nervous system (including the brain), the red blood cells, and the kidneys. |