How Does Diet Affect Metabolism?
Your metabolism is not something you’re born with and never changes. It fluctuates, constantly — from time of day, feeding inputs, exercise and body weight.
“It's debated how much a fast versus slow metabolism is real,” says Joseph A. Baur, PhD, associate professor of physiology at the University of Pennsylvania Perelman School of Medicine Institute for Diabetes, Obesity and Metabolism. “Basically most people have similar metabolism for a given amount of tissue that's present on their bodies.” So you do not have a comparably slow or fast metabolism. You have both.