grape fruit pulp
. Two round plastic containers of different sizes.
A large bowl.
The definition of solid varies greatly. The most extreme form of fasting is not to allow anything other than water to pass your lips for 12 to 24 hours, or even longer. A looser definition is not eating solid foods and just consume protein drinks or juice. For the body to start burning fat while fasting, it must enter into a state called ketosis. Ketosis occurs when the body has used up its glycogen supply and need more energy. It refers to protein sources such as muscle mass and begin to break protein into amino acids, and then to glucose for use by the body.
Normal body functions use glucose as an energy source, and the human brain requires glucose to function. While fasting, the energy sources that are not resolved through food intake. The body turns to its glycogen reserves. Glycogen is stored in the liver and converted to glucose in the initial phases of fasting. When the body’s glycogen supply has been used, it looks for other sources of glucose. As mentioned previously, the body is able to convert protein to glucose. But your body also want to protect their sources of protein, so it begins the process called ketosis, so the body does not empty quickly their protein supply. Ketosis convert body fat into ketones, which can be used as an energy source. Induced ketosis occurs when a person’s carbohydrate intake is severely limited. Ketosis occurs during a total fast. If a fast is complemented with juice drinks, which are high in carbohydrates, the body will first use all available carbohydrates for energy and normal cell function. High-protein, low-carbohydrate diets also induce ketosis.
Intermittent fasting, limiting food intake for a number of hours or parts of the day, may have other health benefits. A study done at the University of Utah at 448 individuals showed that intermittent fasting lowered risk of heart disease and the prevalence of diabetes. The results of this study were published in October 2008 in the American Journal of Cardiology. Consult your doctor if you are interested in fixed or reduce calories to burn fat and lose weight. Your doctor may send you to a nutritionist who will help you assess your diet and calorie needs to recommend a healthy diet.