QUOTE from Dr Fung (emphasis mine):
“The human body is well adapted for dealing with the absence of food. What we’re describing here is the process the body undergoes to switch from burning glucose (short term) to burning fat (long term). Fat is simply the body’s stored food energy. In times of food scarcity, stored food (fat) is naturally released to fill the void. The body does not “burn muscle” in an effort to feed itself until all the fat stores are used. It’s crucial to note that all these beneficial adaptive changes do not occur in the caloric-reduction diet strategy.
HOW YOUR HORMONES ADAPT TO FASTING Insulin
FASTING IS THE most efficient and consistent strategy to decrease insulin levels, a fact first noted decades ago6 and widely accepted as true. All foods raise insulin; therefore, the most effective method of reducing insulin is to avoid all foods.” 
NOTE (my commentary)
The human body is well adapted for dealing with the absence of food.
In times of food scarcity, stored food (fat) is naturally released to fill the void.
What gets my attention?
Do I understand the need or problem?
Do I understand the potential solution?
Do I understand how to apply that strategy?
What questions do I have for the experts? What might be the answers?
Who needs to hear this?
What do I do next?
SOURCE – Footnotes:
 “The Obesity Code: Unlocking the Secrets of Weight Loss” by Dr. Jason Fung, Timothy Noakes, page 239.
Image: On-Off Switch.jpg From Wikimedia Commons
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Key: Fung-10-30.64 Last Revision: 02/02/2021