Making the saliva you just used while chewing the cabbage is by itself, a huge and unappreciated chemical effort.
Once in the stomach, chewed food has to be churned in order to mix it with hydrochloric acid, pepsin, and other digestive enzymes. Manufacturing these enzymes is also considerable work! Churning is even harder work than chewing but normally, people are unaware of its happening. While the stomach is churning (like a washing machine) a large portion of the blood supply is redirected from the muscles in the extremities to the stomach and intestines to aid in this process. Anyone who has tried to go for a run, or take part in any other strenuous physical activity immediately after a large meal feels like a slug and wonders why they just can"t make their legs move the way they usually do. So, to assist the body while it is digesting, it is wise to take a siesta as los Latinos do instead of expecting the blood to be two places at once like los norteamericanos.
After the stomach is through churning, the partially digested food is moved into the small intestine where it is mixed with more pancreatin secreted by the pancreas, and with bile from the gall bladder. Pancreatin further solubilizes proteins. Bile aids in the digestion of fatty foods. Manufacturing bile and pancreatic enzymes is also a lot of effort. Only after the carbohydrates (starches and sugars), proteins and fats have been broken down into simpler water soluble food units such as simple sugars, amino acids and fatty acids, can the body pass these nutrients into the blood thorough the little projections in the small intestines called villi.
The leftovers, elements of the food that can"t be solubilized plus some remaining liquids, are passed into the large intestine. There, water and the vital mineral salts dissolved in that water, are extracted and absorbed into the blood stream through thin permeable membranes. Mucous is also secreted in the large intestine to facilitate passage of the dryish remains. This is an effort. (Intestinal mucous can become a route of secondary elimination, especially during fasting. While fasting, it is essential to take steps to expel toxic mucous in the colon before the poisons are re adsorbed.) The final residue, now called fecal matter, is squeezed along the length of the large intestines and passes out the rectum.
If all the digestive processes have been efficient there now are an abundance of soluble nutrients for the blood stream to distribute to hungry cells throughout the body. It is important to understand the process at least on the level of oversimplification just presented in order to begin to understand better how health is lost or regained through eating, digestion, and elimination. And most importantly, through not eating.
How Fasting Heals
Its an old hygienic maxim that the doctor does not heal, the medicines do not heal, only the body heals itself. If the body can"t heal then nothing can heal it. The body always knows best what it needs and what to do.
But healing means repairing damaged organs and tissues and this takes energy, while a sick body is already enervated, weakened and not coping with its current stressors. If the sick person could but somehow increase the body"s energy resources sufficiently, then a slowly healing body could heal faster while a worsening one, or one that was failing or one that was not getting better might heal.
Fasting does just that. To whatever degree food intake is reduced the body"s digestive workload is proportionately reduced and it will naturally, and far more intelligently than any physician could order, redirect energy to wherever it decides that energy is most needed. A fasting body begins accessing nutritional reserves (vitamins and minerals) previously stored in the tissues and starts converting body fat into sugar for energy fuel. During a time of water fasting, sustaining the body"s entire energy and nutritional needs from reserves and fat does require a small effort, but far less effort than eating. I would guess a fasting body used about five percent of its normal daily energy budget on nutritional concerns rather than the 33 percent it needs to process new food. Thus, water fasting puts something like 28 percent more energy at the body"s disposal. This is true even though the water faster may feel weak, energyless.
I would worry if sick or toxic fasters did not complain about their weakness. They should expect to feel energyless. In fact, the more internal healing and detoxification the body requires, the tireder the faster feels because the body is very hard at work internally. A great deal of the body"s energy will go toward boosting the immune system if the problem is an infection. Liberated energy can also be used for healing damaged parts, rebuilding failing organs, for breaking down and eliminating deposits of toxic materials. Only after most of the healing has occurred does a faster begin to feel energetic again. Don"t expect to feel anything but tired and weak.