Dr. Jason Fung - Deep Dive - Using Fasting / Intermittent Fasting for Optimal Health, Wellness and Longevity with Dr Jason Fung - Part 1
Jason Fung is an author and nephrologist, a doctor who specializes in kidney health. He is considered one of the world's leading experts when it comes to weight loss and reversing diabetes by way of fasting. For the first few years of practice, Jason was like most doctors when it came to treating patients – conventionally oriented.
During this time, he had plenty of patients who had obesity as the primary cause of their kidney issues. He realized in order to treat their kidneys, he had to treat their diabetes and for that to happen, his patients had to lose weight. And so began his interest in fasting and its many benefits beyond weight loss.
Today, Jason gives us his expert opinion on what fasting is, why he thinks fasting should be something people naturally do, and why he suggests weight management is not just about calories.
"Fasting is really the oldest dietary intervention in the book." Jason Fung
In this episode, you'll learn:
- A diet focused on a "calories in, calories out" approach is bound to fail. Obesity has little to do with calories as it does with carbohydrates and insulin sensitivity.
- The body cannot sense calories as compared to how it can sense carbs and hormones and obesity is largely a hormonal issue.
- A kale salad will have a different effect on your hormones particularly insulin as a plate of cookies with the same calories. Eating a kale salad everyday will give you different results vs if you eat a plate of cookies every day.
- Insulin is the hormone that tells the body we're eating now. Insulin also tells liver to make glycogen, the storage form of sugar.
- Fasting won't make you lose muscle. The body burns "junk" protein and burns it away when you fast. This is why fasting is also considered a type of detox regimen.
- When you break your fast, the body starts to break down old nutrients and build new ones. You're basically giving your body a renovation.
- If there's a deficit in calories, the body reduces energy expenditure which makes calorie cutting ineffective.
- Fasting on a regular basis helps prevent diseases as it helps burn junk inside the body and turn them to fuel.
- If you keep insulin levels high all the time you're telling your body to keep the energy going in which is why the whole "eat 10 small meals a day" fad is only a short-term solution to weight loss.
- A lean person who fast will burn more protein than fat than an obese person for obvious reasons.
Key Takeaways:
- Fasting isn't going to make you tired. When you want more energy you should fast.
- Eating and fasting must be kept in balance.
- Fasting preserves lean body mass much better than caloric restriction.
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