The main point of intermittent fasting is keeping your insulin levels low for the longest time possible, increasing insulin sensitivity, and forcing the body to use stored fat for energy.
Reduced calorie intake is the bit that makes you lose weight. Increased insulin sensitivity is a result of weight loss. "forcing the body to use stored fat for energy" is the mechanism by which weight loss happens.
It started as a side project in 2001, but now it’s my main business.
Here's my own profile if anyone's interested: https://volt.fm/soheilpro