Between 50% and 90% of all
severe allergic reactions to foods are caused by only eight foods. The most
common food allergies are: milk, eggs, peanuts, tree nuts, soy, wheat, fish and
shellfish. Each of these "big eight" food allergies has its own unique
challenges.
The most common food allergies for adults differs from the most common food
allergies for children. Many children outgrow their allergies to milk, eggs, or
wheat in early childhood. Adults may develop new allergies later in life.
The good news is that these ingredients should be clearly labeled with an
allergy warning on all packaged foods made in the United States. For example, a
food that contained hydrolyzed vegetable protein derived from soy would be
required to have a statement that said "Allergy warning: contains soy" on the
ingredient label.
The bad news is that not all foods are manufactured in the United States, and
products such as shampoo or lotion may contain these foods but are not required
to list them separately as allergens. You still need to be a label detective.
The most common food allergies, in order of frequency, are:
Milk
•Frequency: Cow's milk is the most common food allergy in American children. 2.5
percent of children have a cow's milk allergy. It is not a major allergen for
adults.
•Outlook: Up to 80 percent of children will outgrow their allergy to dairy
products by the age of six.
•Where allergens hide: Deli meats, "non-dairy" creamer, skin and hair care
products, canned tuna, and some craft paints.
•Other sensitivities: A milk allergy is an immune response to milk proteins,
which is different from lactose intolerance, in which your body lacks the enzyme
needed to digest milk sugars. Children with milk allergy must avoid all dairy
products, including those that are lactose-free.
•Dairy Allergy Basics
•Foods to Avoid on a Dairy-Free Diet
Peanuts
•Frequency: 1.4 percent of children and 0.6 percent of adults are allergic to
peanuts. There is some evidence that the rate of peanut allergies is increasing
among children in the United States.
•Outlook: Peanut allergies are often very severe, with higher rates of
anaphylactic reactions than milk, eggs, or wheat. They also tend to be lifelong
allergies. Only 20 percent of children will outgrow their peanut allergy by the
age of six.
•Where allergens hide: Peanut butter is sometimes used as a thickener for chili
or "glue" for egg rolls. Peanut oil may be found in some skin care products. A
common source for accidental exposure in children is bird seed.
•Other sensitivities: People with peanut allergies have a higher rate of tree
nut allergies than the general population, even though peanuts are legumes
(beans), not nuts.
•Peanut Allergy Basics
•Foods to Avoid on a Peanut-Free Diet
•Surprising Non-Food Peanut Products
•Raising a Peanut-Free Kid
Shellfish
•Frequency: Shellfish allergy is the most common food allergy for adults. Two
percent of American adults have a shellfish allergy. 0.1 percent of children
have a shellfish allergy.
•Outlook: Shellfish and fish are allergies that often develop later in life,
unlike many other allergies. They tend to be severe, life long allergies.
•Where allergens hide: Vitamins, pet food, fertilizer, fish food. People with
shellfish allergies may react if they breathe in airborne particles from
sizzling or boiling food.
•Other sensitivities: People may be allergic to crustaceans (lobsters, shrimp,
crawfish) or mollusks (clams, oysters, mussels) or both.
•Shellfish Allergy Basics
•Foods to Avoid on a Shellfish-Free Diet
Tree Nuts
•Frequency: 1.1 percent of children and 0.5 percent of adults have a tree nut
allergy. There is some evidence that the rate of tree nut allergies is
increasing in the United States.
•Outlook: Tree nuts tend to be life long allergies, and have higher rates of
anaphylactic reactions than milk, eggs, or wheat. Only 9 percent of children
will outgrow their tree nut allergy by age six.
•Where allergens hide: There are so many names for tree nuts that it can be
difficult to determine if a product contains nuts. Nut shells are sometimes used
to stuff beanbag kick toys, such as hacky sacks.
•Other sensitivities: Tree nuts are actually very different from each other, and
it is possible to be allergic to one nut, for example almonds, but not others.
It is also possible to be allergic to multiple nuts as well as peanuts.
•Tree Nut Allergy Basics
•Nut Ingredients - List of Tree Nuts and Nut Ingredients
Eggs
•Frequency: Eggs are the second most common food allergy for children. 1.5
percent of children are allergic to hen's eggs. Eggs are not a major allergens
for adults.
•Outlook: Up to 80 percent of children will outgrow their allergy to eggs by the
age of six.
•Where allergens hide: Many immunizations are created by growing viruses in
hen's eggs. Ask your child's doctor about which immunizations are safe for him.
Other medications, such as anesthetics, may also contain eggs. "Egg substitutes"
such as Egg Beaters contain eggs.
•Other sensitivities: It is possible to be allergic to just egg white, just egg
yolk, or both. It is probably not possible to completely separate a white and a
yolk from an egg at home.
•Egg Allergy Basics
•Foods to Avoid on an Egg-Free Diet
Fish
•Frequency: 0.4 percent of adults and 0.1 percent of children have a fish
allergy. It is possible to be allergic to just one species of fish and not
others.
•Outlook: Fish allergies often develop in adulthood. They tend to be severe,
life long allergies.
•Where allergens hide: Restaurants may fry fish in the same oil as other foods.
Kosher gelatin (found in kosher pudding or marshmallows) is made from fish
bones.
•Other sensitivities: Fish that is less than fresh can develop high levels of
natural histamine. When eaten, it can produce symptoms similar to food
allergies, but called scromboid poisoning. If you have symptoms such as swelling
of your mouth or throat, difficulty breathing, nausea or vomiting after eating
fish, call 911. Taking a piece of the fish with you to the hospital will help
doctors determine the cause of your symptoms.
•Fish Allergy Basics
•Foods to Avoid on a Fish-Free Diet
Soy
•Frequency: 0.4 percent of American children are allergic to soy. It is not a
major allergen for adults.
•Outlook: About 50 percent of children will outgrow their soy allergy by the age
of seven.
•Where allergens hide: Soy is a very common ingredient in packaged foods, hair
and skin products, and even gasoline. Beanbag toss toys are often stuffed with
soybeans. Some organic stuffed animals are made from soy fibers. Vitamin E is
usually derived from soy, and there may not be a soy allergy warning on the
ingredient label.
•Other sensitivities: Because of the risk of developing a soy allergy, babies
with milk allergy or milk protein intolerance should not be fed soy-based
formula.
•Soy Allergy Overview
•Foods to Avoid on a Soy-Free Diet
•Surprising Non-Food Soybean Products
Wheat
•Frequency: 0.4 percent of American children are allergic to wheat.
•Outlook: About 80 percent of them will outgrow their wheat allergy by age six.
•Where allergens hide: Soy sauce, beer, deli meats, imitation crab meat. Spelt
and kamut contain the same proteins as wheat, and should not be eaten by people
with wheat allergies. Non-food items such as glue, Play-Doh, lotions, and
shampoos.
•Other sensitivities: Wheat allergy is different from Celiac disease, which is
an autoimmune disorder in which you can not digest wheat or other
gluten-containing grains, such as barley or rye. Wheat allergies can be
difficult to figure out, since sometimes allergy symptoms only appear in
combination with exercise (exercise-induced anaphylaxis).