From stored fats
Fasting causes your body to slow down it's metabolism and conserve as much energy as possible. It will gradually consume muscle and fat as an energy source.
Protein
The body primarily utilizes fat for energy during periods of low intensity exercise or when fasting.
Fasting is generally considered catabolic, meaning it promotes the breakdown of molecules for energy. During fasting, the body uses stored energy reserves like glycogen and fat for fuel. However, intermittent fasting can also have some potential anabolic effects, such as increasing growth hormone levels and promoting cellular repair processes.
Reserved energy in the body is stored in the form of glycogen in the liver and muscles, as well as in adipose tissue (body fat). This energy can be used by the body when needed, such as during fasting or periods of increased energy demand.
fasting is considered to purify the body
fasting is considered to purify the body
Fasting causes reactions in the body which change the rate of metabolism. The body thinks it is in some kind of famine and starts to use and store every bit of energy it can. Ie. the next time you eat what ever energy isn't used will be stored, just in case.
Fasting for long periods is something which should be discouraged. Your body needs a regular supply of nutrients, and regular fasting will tend to lead to overcompensation when you aren't. Additionally, total fasting will encourage oxidation of muscle mass for energy.
During a period of fasting, the body first uses stored glycogen from the liver and muscles as a source of energy. Once the glycogen stores are depleted, the body starts breaking down fat reserves to produce energy through a process called lipolysis.
To successfully complete 30 days of fasting while maintaining good health and energy levels, it is important to follow these guidelines: Stay hydrated by drinking plenty of water during non-fasting hours. Eat balanced meals during non-fasting hours to ensure you are getting essential nutrients. Avoid overeating during non-fasting hours to prevent feeling sluggish during fasting periods. Get enough rest and sleep to support your body's energy levels. Listen to your body and adjust your fasting schedule if you start feeling unwell.
The effects on metabolism from starvation are similar to those from fasting. Both result in a decrease in metabolism to conserve energy, as the body shifts to using stored energy reserves for fuel. This can lead to weight loss and a decrease in overall energy expenditure.