How often can I fast? Can I do it regularly? I heard it slows your metabolism if done continuously. How often do you fast?
Read the book “Burn: New Research Blows the Lid Off How We Really Burn Calories, Lose Weight, and Stay Healthy” which discusses the science of metabolism extensively and show some fascinating turns that set much of what we think we know about energy expenditure on it eat. Fasting can slow how we burn the stores of energy we have in our body over time but it is temporary due to the fast. What the author shows is what is call “constrained energy expenditure” is how we use energy at the evolutionary level, i.e. we burn the same amount of kilocalories each day no matter our activity levels. Our BMR basil metabolic rate shows us what we will burn in an average day and if we fast we will still burn that average kilocalories. For anyone that has fasted for extended periods observes that after maybe a week the weight loss slows dramatically even if one is active during that time. The metabolism slows in the sense that the body is constraining then use of energy where it is needed from the stores in our body in the effort to use protect organs and muscle, but once we eat again it uses that energy first and stores what is not burned. There are excellent benefits to fasting and getting into those long term stores is one of them as well as perhaps resetting the metabolism a little bit. We adapt fast.