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An ester of three fatty acids and glycerol. Triacylglycerols are the main components of animal and plant lipids. They are the most concentrated source of energy in the human body and are stored in subcutaneous fat deposits where they contribute to insulation. Fat deposits contain over 70 000 kcal of stored energy, but the triacylglycerol is not immediately accessible for muscle respiration because it must be broken down into its basic components for transport in the blood (see fat mobilization) and then oxidized before entry into the Krebs cycle (see beta oxidation).

Subjects: Chemistry — Sports and Exercise Medicine.

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