What Does the Human Brain Prefer to Metabolize as an Energy Source?
                                
                                
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                                    4 min read                                
                            
                                The human brain is a surprisingly energy-hungry organ, consuming approximately 20% of the body's total energy at rest despite making up only 2% of its weight. Its preferred metabolic fuel is glucose, but it possesses a remarkable metabolic flexibility to adapt to alternative sources when necessary.