FOOD ALLERGIES
A food allergy is an immune system response. It occurs when the body mistakes an ingredient in food -- usually a protein – for a harmful substance, and creates a defense system (antibodies) to fight it. Food allergy symptoms develop when the antibodies are battling the "invading" food. The most common food allergies are peanuts, tree nuts (such as walnuts, pecans, and almonds), fish and shellfish, milk, eggs, soy products, and wheat.

FOOD INTOLERANCE 
Unlike a food allergy, food intolerance is a digestive system response. It occurs when something in a food irritates a person's digestive system, or when someone is unable to properly digest or breakdown a particular food. Intolerance to lactose, which is found in milk and other dairy products, is the most common example of this condition.

SYMPTOMS

CELIAC DISEASE
Celiac disease is a condition where the body creates an immune reaction to gluten, found in wheat products. It is diagnosed by an M.D. via a biopsy and /or blood test. Even though many people test negative for celiac disease, they may still experience discomfort when consuming foods containing wheat, such as common wheat flour. There are many wheat- and gluten-free products on the market, but using alternatives to wheat from whole foods can offer both a solution and excellent nutrition.

GLUTEN-FREE FOODS
Amaranth
Arrowroot
Buckwheat
Corn or maize
Flax
Garfava (garbanzo + fava bean mix)
Legumes (dried beans)
Millet
Montina
Nut flours
Oats* (Bob’s Red Mill Oats and Cream Hill Estates)
Potatoes
Quinoa
Rice
Sorghum
Soy
Tapioca
Teff

*Some oats contain gluten, please check labels or consult your physician.
Resources: 
GlutenFree.com
Amazinggrains.com
Foodallergy.org