Fasting for a week:
- Causes significant changes in protein levels across various organs.
- May have health benefits beyond weight loss, but only after 3 days.
- Switches energy source from glucose to fat after 2-3 days.
- Average weight loss of 5.7 kg (fat and muscle), with most fat loss sustained after 3 days of eating.
Implications:
- Provides insights into the molecular basis of fasting's health effects.
- Paves the way for developing alternative treatments based on fasting benefits.
- Confirms historical use of fasting for specific health conditions.
The article says it was "fat and lean mass" not water weight. And while the "lean mass" (which I guess could be water) retuned after eating again, the "fat mass" did not.
Lean mass is generally known as a combination as everything besides fat. So muscle, water, and shit would be my guess.
Yes with a normal diet there is something like an average of 5 pounds of actual shit inside of you. Initial weight loss from calorie restrictions literally happens because there is less poop.