It has yet to be discovered why some people react one way to foods, while others don't.
The only thing that is known is that as soon as an allergen to food hits, the symptoms won't be too far behind.
A particularly tough food allergy, the gluten allergy, causes people to be extremely sensitive to gluten.
Celiac disease, related to it, affects the lower intestines.
How it occurs is that, when any food with gluten in it hits the small intestines, the intestines retaliate by attacking the lining.
This weakens the stomach and can possibly lead to very serious problems with health down the road.
It is this lining that takes care of the body's absorbing of the nutrients in the food that we eat.
After weakening of this lining, it becomes very hard for us to convert food to fuel.
Gluten allergy can become present in children, soon after the baby is starting to eat solids.
It is not clear what the reasons for gluten allergies becoming developed in people, but the only cure once it starts is to just not take in gluten ever again.
Gluten is common in foods that contain wheat.
This includes pasta, bread and any baked creations, all of which people suffering gluten allergies should avoid entirely.
You can also find gluten in pastries and breakfast cereals, and biscuits, sauces and instant soups.
Making it more difficult to diagnose, gluten problems in children and adults are not the same.
Children have a hard time growing normally, may suffer unexplained weight loss, and have a problem eating.
They may also vomit and diarrhea regularly.
With their lower intestines damaged, all of the minerals and vitamins they are taking in just aren't doing them a great deal of good.
Without the benefit of using minerals and vitamins, children take on a guant, pale look, with no energy to boot.
For adults, things can happen much the same way, however they have the added trouble of either diarrhea or constipation and losing weight to make things difficult for them.
Add to this harsh fatigue, lethargy, ulcers in their mouth, depression and pain in their bones, and adults just don't have an easy time of it.
As with any other food allergy, treating sufferers of gluten allergies starts the same: avoiding the allergen.
Lucky for suffers of gluten allergies, food manufacturers are devising substitutes to help out, such as sunflower oil instead of regular oil, and going for the wine, while staying away from beer.
Medications can help gluten allergy sufferers.
However, gluten sufferers don't show external signs, like other food allergies that show off a rash on the skin.
Gluten allergies attack from within, so that detecting it is not easy to do.
With pain erupting from the small intestines, oral medication can ease it, and vitamin supplements can help give what isn't being taken in normally.
The important thing for gluten allergy sufferers is to keep a close eye on what they eat.
Get into label reading to find all things wheat to avoid.
Only practiced self-discipline will win the battle.
The best diet for celiac disease sufferers is anything with seafood and fish, eggs, nuts and vegetables, fruit and salads, rice and meat, and eggs and all things dairy.
If a sufferer doesn't treat their disease, then anemia or bone disease can result, and this can also make the way to some type of cancer down the road.
Keeping gluten foods out of the diet is the biggest treatment success.
The less gluten eaten, the greater the chance of better health as they get older.