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Fatty acids are chains of carbon atoms held together by either single or double chemical bonds. The chemical bonds determine whether the fatty acid is considered saturated or unsaturated. Fatty acids serve as sources of energy for various organs and muscles in the body. They are typically joined together in groups of three; this molecule is called a triglyceride.
Your body uses two fuels: glucose and fatty acids. Fatty acids differ from glucose in that they provide a fuel source used only during longer periods of fasting. These acids come from the fat you eat and are stored in your fat cells as triglycerides (a scientific name for fat).
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