Many misconceptions surround fasting, with some believing it slows metabolism and causes fatigue. However, Dr. Jason Fung, a proponent of intermittent fasting, challenges this notion. In a discussion on the Diary of a CEO podcast, Dr. Fung explains how fasting can actually boost energy levels by utilizing stored calories for energy, increasing the metabolic rate. This counters the common belief that fasting makes you sluggish.
Fasting Increases Energy, Not Fatigue

Fasting triggers a state of heightened alertness known as the fight-or-flight response. Dr. Fung explains that this response, driven by increased cortisol and growth hormone, enhances the body’s ability to efficiently use stored energy, making hungry animals more dangerous as they are ready to find food.
Health Benefits Beyond Weight Loss

Research indicates that fasting provides health benefits beyond weight loss, such as reducing harmful inflammation in the body. A 24-hour fast can increase levels of arachidonic acid, potentially lowering the risk of chronic diseases like Alzheimer’s and Parkinson’s.
Fasting and Brain Health

Fasting may also benefit brain health by reducing inflammation and boosting arachidonic acid levels, potentially protecting against neurodegenerative diseases. While more research is needed to confirm long-term effects, fasting shows promise in supporting cognitive health with age.
The Breakfast Debate: To Eat or Not to Eat?

While fasting has its proponents, experts like nutrition therapist Justin Nault caution against skipping breakfast, citing potential metabolic issues. Breakfast is seen as important for kickstarting metabolism and preventing unhealthy metabolic adaptations. It’s essential to consider individual health needs before deciding to try fasting.
Should You Try Fasting?

If considering fasting, consult with a healthcare professional first. While fasting can have health benefits, it’s not suitable for everyone. Understanding the science behind fasting and its effects on the body is crucial in making an informed decision about whether it is right for you.
Sources
- ” Expert shares surprising thing that happens to your body when you don’t eat that’s the ‘opposite’ of what most think.” Lad Bible. Joe Harker. August 13, 2024.
- “Fasting for 24 hours between meals could stop serious illness, scientists say.” Lad Bible. Tom Earnshaw. January 2024.