So what precisely is metabolism? “Metabolism is a flowery time period to explain the intricate pathways inside our cells and physique that finally preserve the physique transferring and functioning,” says Tracy Lockwood Beckerman, M.S., R.D., CDN, a registered dietitian and the writer of The Higher Interval Meals Resolution. “The tip product of metabolism is the power wanted for important capabilities within the physique comparable to digestion, respiration, progress, and far more.”