The Liver:
The liver is the largest gland in the body. Amongst other things, it is a detoxifying agent and a blood reservoir. It breaks down waste matter in the blood and manufactures blood proteins; converting sugar and carbohydrates into glycogen, which it then stores for the manufacture of glucose when needed. It collects vitamins and minerals from food and stores them for future use. The liver also manufactures bile, which is stored in the gall bladder, and released, when necessary, into the duodenum to aid in the digestion of fats.
During digestion, bile flows from the gall bladder and liver into the small intestine, thus helping to keep it alkaline and aiding the pancreatic enzymes to digest fats more easily. Eventually the bile fluids circulate back to the liver, from the colon, carrying toxins with them. These must be neutralized by the liver and, finally, eliminated by the kidneys.
The allergic reaction creates turmoil in the body when antibodies and antigens react, causing mast cells to break up and histamine to be released in large quantities. These adverse chemical reactions result in the body becoming overloaded with toxins which eventually find their way to the colon for elimination. Unfortunately, the constipation, which is so often present in allergy conditions, causes these toxins to remain in the colon. This results in the bile fluids continuously overloading the liver with recirculated toxins from the colon and eventually, the liver may become incapable of coping fully with its detoxifying duties. When this happens, the liver degenerates, the system becomes poisoned and the individual, who has never been well because of masked allergies, now becomes seriously ill.
The effects, therefore, of allergies, particularly several masked allergies, on the liver, over a period of time, can be extremely serious and cause further severe illness.
The colon:
The colon is the main part of the large intestine and consists of the ascending colon, the transverse colon, the descending colon and the sigmoid colon. It is a muscular tube which carries food residue (chyme) from the cecum (the first part of the large intestine) to the rectum (the last part). The first half of the colon, from the cecum to the middle of the transverse colon, is responsible for the creation of wavelike motions known as peristaltic waves, which push the contents of the colon to the rectum for eventual evacuation.
Besides the formation of peristaltic waves, the first half of the colon also extracts from the chyme, any available nutritional material, including water, that the small intestine was unable to collect. For this purpose, it mulches the chyme and transfers liquid and nutrients through its walls into the bloodstream. This is done through the blood vessels lining the walls of the colon, which then transfer the nutrients back to the liver for processing.
Constipation, which often accompanies food allergies, causes the accumulation of fecal matter in the colon which proceeds to putrify and ferment. Combine this with the additional wastes caused by the body’s continuing allergic responses, and an overloaded toxic situation occurs in the colon, with devastating effects. The colon is faced with the extraction of remaining nutrients from fermenting, toxin-laden rubbish. As a result, polluted nutrients pass back into the bloodstream to aggravate further the allergy condition.
Link: Allergy Effects on the Liver and Colon