Allergies are caused by an over-reaction of an individuals immune system to a specific substance which most other people would find harmless.
To the person with the food allergy, if a meal contained a substance they were allergic to, they could reasonably consider it a "toxin". However, to every other person without that particular food allergy, it would not be considered a "toxin".
As such, "toxins in food" do not cause allergies, but they may trigger them in already allergic individuals.
E.g, some people are born with a penicillin allergy. But in most cases this will not bother them, unless they are given penicillin. In this case, they will have an allergic reaction; penicillin is the trigger, rather than the cause of the allergy.
NutsFishWheat/glutenMilk
Because we have left our native diets, and consume many trace toxins which lower our immunities to various lectins found in food.
Nuts eggs and the immune system
The top of the food chain. As organisms consume other organisms, the toxins are all passed up in the food chain. Therefore, the top of the food chain will have the highest concentration of toxins.
The most common food allergies are dairy, nuts, shellfish and wheat. The only way to relieve the symptoms of food allergies is to not eat the foods that a person reacts to.
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.
It depends on the toxin. Exotoxins are a toxin that is released by bacteria into the surrounding environment. These would be released as a defense mechanism and would not be found in the cooking of food. Endotoxins, which is considered to be a toxin kept "within" the bacterial cell and released only after destruction of the bacterial cell wall. Such as when cooking.
Food allergies in dogs are typically treated through avoiding the allergen - there are a dozen or so hypoallergenic and novel protein foods available through your veterinarian.
A human being can have allergy from any type of food so there's no specific food that prevents food allergy. Yes you can follow a strict diet to prevent allergies once your physician has identified foods to which you are allergic.
No. Many foods contain toxins (think mushrooms) which must be removed to make foods safe to eat. But microorganisms can also make food unsafe.
Fruits are a good place to avoid the food allergies for that blood type. Watch what you eat, and make sure you don't let anything get past you without knowing what it is.
Many food allergies develop from a young age. To help avoid getting food allergies, do not allow your kids to eat these foods until they are at least two years of age when their immune system is stronger and they have a less likely possibility of developing an allergy to the food. Most common foods that kids develop allergies to are fruits, peanut butter, dairy and other nuts. If the parent has an allergy to a particular food, avoid giving it to them until later in life.