The reason could be because no one has the same DNA as another person. Your DNA holds all the info about the way you look, the way your body reacts to things...overall it stores all the info about your body. In that DNA, it "says" that you will react to a certain food, while another person's DNA "says" that the food you reacted to won't affect them the same way. :)
Not necessarily; some people are only allergic to cats or dogs and not both. Not necessarily; some people are only allergic to cats or dogs and not both.
There is no such thing to be allergic to all food. Some people have allergies to many foods, however they can still eat other foods.
glucose can be found in some foods and many people are allergic.
None that I know of. Honey is one of the purest foods that you can buy but maybe some people are allergic to honey.
The list would be miles long. It would wrap the earth a million times. Humans can be allergic to anything. From peanut butter, to water, to the sun, to silver to anything.
Have yourself checked for Diabetes. I know that it makes your skin 'itchy', but I doubt if it is only after you eat 'sweet foods'. You could be allergic to some of these 'sweet foods'. See your doctor.
As a nation, French people are not allergic to meat. Some French people will be allergic to meat. Some people in any country in the world will be allergic to meat.
Allergies to peanuts (legumes), shellfish, and strawberries are quite common, and often life threatening.
Some people were allergic to some of the ingredients in,the kool-aid but only certain people with rare diseases
Yes, peanuts can cause allergic reactions in some people.
No, I am not allergic to my hamster. That is because I am not allergic to many things. But some people are allergic to some types of animals.
Yes, some people are.