The main signs and symptoms associated with gluten intolerance (celiac disease) are due to the inadequate absorption of nutrients from food. This condition results in:

• Abdominal bloating and pain
• Diarrhea
• Constipation
• Foul-smelling gas and stool
• Steatorrhea (an increased amount of fat in the stool)

Some of the signs and symptoms associated with gluten intolerance occur as a result of the malnutrition and vitamin deficiencies often caused by the condition. These may include:

• Anemia (low number of red blood cells) and fatigue. Due to a lack of absorption of vitamin B12 and iron.
  
  
• Weight loss. Due to poor absorption of carbohydrates, proteins and fats.
  
  
• Bone pain, bone weakness and osteoporosis. Due to a lack of absorption of vitamin D.
  
  
• Swelling (often around the ankles and feet). Due to fluid retention.
  
  
• Tingling and numbness from nerve damage. Due to deficiencies of B12 and thiamine.

Other indicators may include behavioral changes, muscle cramps, joint pain, mouth sores, tooth discoloration, itchy rash, weight gain, seizures, missed menstrual periods, infertility or miscarriages.

The signs and symptoms displayed by gluten intolerant individuals vary in type and severity depending on the person. Age is usually a significant factor in how the disease presents itself.

Symptoms may begin in childhood or adulthood. As a child reaches adolescence, the symptoms of gluten intolerance may be reduced or disappear, though they often return during adulthood.

It is also important to note that although some people with gluten tolerance suffer severe symptoms, some suffer none at all.