Kamis, 07 Juni 2012

Food Allergies


Food Allergies 
A food allergy is any adverse reaction to an otherwise harmless food or food component that involves the body’s immune system. To avoid confusion with other types of adverse reactions to foods, it is important to use the term “food allergy” or “food hypersensitivity” only when the immune system is involved in causing the reaction..There is probably no area more controversial and perplexing as suspected allergies connected with food. These range from sensitivity to food additives, such as coloring, preservatives, and other foreign chemicals, to plant sources, to actual hypersensitivity to protein and other constituents of fruits, grains, nuts, vegetables, or animal foods. Careful detective work and long-term adherence to dietary regimens are frequently necessary to first diagnose and then live with food allergies. 

It is true that the stage is set for many food allergies by feeding patterns in infancy, such as the early introduction of solid foods, the widespread use of cow’s s milk in prepared formulas, and the relative lack of mother interest in prolonged breast feeding. Maternal use of drugs which sensitize the babies in utero or during the breast-feeding period can also prepare the way for allergic responses to develop.

Cow' Milk
The most common allergy that occurs in infancy is a sensitivity to cow’s milk. This is often manifested in diarrhea, unusual regurgitation, excessive gas or colic, or a “failure to thrive.” Usually a change to soymilk formula if breast feeding is not available will stabilize the situation, although rarely more restricted and specific formulas have to be devised.

A majority of the black and oriental races and lesser percentages of Caucasians are sensitive to cow’s s milk even in adult life. This, however, is due to the deficiency of lactase, an enzyme which helps to split milk sugar (lactose) and render it available for absorption. Diarrhea, excessive gas, and an acid stool are produced. Simply abstaining from milk is curative. You must always suspect the diagnosis in order to apply the proper remedy at once, thus removing the cause.

Other people are truly allergic to the proteins of cow’s milk and find unpleasant symptoms, such as frequent sinus or nasal congestion, related to the intake of milk. Please note, however, that skin scratch tests for food allergies are notoriously unreliable as indicators of an individual’s s sensitivity to the eating of these foods. It appears that the skin is just not a parallel indicator with the gastrointestinal tract. The only way to be certain in diagnosing food allergies is through trying an elimination diet.

Chocolate and Wheat
Next to milk as a cause of allergy, chocolate and wheat lead the list. Usually the grains are less common allergens, but berries (such as strawberries), nuts, shellfish, eggs, and many other foods can produce similar symptoms. It is believed by some that symptoms resembling hypoglycemia, such as episodic weakness and certain mental aberrations (anxiety, panic attacks, depression, etc.) may be related to food allergies. It must be acknowledged, though, full proof is lacking to completely confirm this theory as yet. Nevertheless, eliminating the offending food, then gradually progressing from a limited diet to a more liberal intake of varied foods will help bring a return of health and strength, with fewer physical symptoms and more emotional stability.

Sulfites
Sulfites are added to foods to serve a variety of purposes. They preserve food by killing bacteria and yeasts. They retain color and apparent freshness by acting as antioxidant. They may also be used to sterilize containers and arrest fermentation in alcoholic drinks. The label may contain any of the following listings, all various types of sulfites: sulfur dioxide, sodium sulfite, sodium bisulfite, potassium bisulfite, sodium metabisulfite and potassium metabisulfite. Many people are allergic to sulfites, reacting with skin rash or asthmatic wheezing.

Carefully test for allergies with a medically approved method. RAST (Radio Allergo Sorbent Test) testing offers an easy way to evaluate the blood for immediate immune reactive (IgE) factors. The more definitive, though expensive, ELISA/ACT TM (Enzyme Linked Immune Sorbent Assay / Advanced Cell Test) measures both immediate and delayed responsiveness to over 300 foods and environmental chemicals. Additional detailed evaluations, however, may require a period of observation and careful dietary therapy in a sanitarium or preventive lifestyle institution to isolate specific factors or undertake dietary trials.


The Big Food Allergens 
The other most common food allergens cause more than 90 percent of all food allergic reactions. They are:
shellfish (crustacea and mollusks)
eggs,fish, peanuts
soy, tree nuts (e.g. walnuts)


Tidak ada komentar:

Posting Komentar