Fasting is a broad term for any sort of abstinence from food, drink (besides water), or both for any period of time. There are many reasons for fasting. Medically, the metabolic changes that occur can be necessary for diagnostic tests and observations, as well as therapy for various conditions. Additionally, it is a tradition in many cultures and religions. And there is a long history of fasting as a tool for political protest, non-violent resistance, or for spiritual enlightenment.
When you fast this means that your body will have no new supplies of carbs, protein and minerals/vitamins (apart from the vitamins you might get from your water). The fasting technically begins chemically when the body has used up all the available energy in the food and begins turning to the carbohydrate stores in the body (the fat stores).
However what it's important to recognise is that your body will eventually run out of these stores too, and that means it needs to look elsewhere for energy to perform just the most basic tasks like breathing and walking. After the carbohydrate stores have been used up the body will then move onto protein stores – meaning the muscles and eventually organs. At this point, the fast has ended and the person is technically starving.
When done properly and safely, there are many benefits to fasting. Fasting has long been used therapeutically, for it’s rejuvenating and restorative powers.The first benefit of that is of course that the body is losing fat and that in turn has various health benefits as well as aesthetic advantages resulting in a more slim and athletic physique.
This has another benefit too and that's that it allows the body to detox itself. This is because the fat stores don't just contain carbohydrates, but also chemicals absorbed from the environment.At the same time, it is suggested that this can provide the body with more energy. This is because the body does not have to take care of the digestive system any longer – a system which requires a large amount of energy.
Pregnant or nursing mothers should never attempt a fast, as their bodies are under increased caloric and physical demands. Additionally, those with kidney or liver diseases, or those who are currently malnourished or anaemic, have a weakened immune system, severely high blood pressure, medication-dependent diabetes, or other medical conditions should consult their doctor before attempting any fast.
In other words, when you fast you force your body to start looking elsewhere for fat and to begin becoming more efficient in its use of the energy, you do have present. By safely undertaking a fast, you can open your body’s healing and restorative powers, reboot your system, and create clarity in your mind and emotions.