Women's Health notes that some of the warning signs of a gluten allergy include persistent gastrointestinal symptoms, a family history of gluten allergies and a vitamin B12, folate or iron deficiency. Even if an individual is not allergic to gluten, there is a possibility that he has celiac disease.
According to Women's Health, examples of gastrointestinal symptoms include bloating, abdominal distension, chronic or severe diarrhea and weight loss. It is highly recommended that the first-degree relatives of individuals who have been confirmed to have celiac disease be tested for the disease as well as a gluten allergy. If left untreated, celiac disease can cause damage to the intestines, which prevents certain vitamins and nutrients from being absorbed.
Individuals are better off not attempting to diagnose themselves with celiac disease or a gluten allergy, notes Women's Health. It is also best to be tested before making a dietary change since the change can make it difficult to determine whether or not gluten is the problem after it has been removed from an individual's diet.
Amy Myers. M.D. notes that there are also non-digestive symptoms of gluten sensitivity, such as headaches and migraines. Gluten also contains gluteomorphines, which can lead to an individual to feel confused due to brain inflammation.