Step 1: Understanding the Concept:
Food intolerance is a digestive system response where the body cannot properly break down a certain food. It is different from an allergy, which involves the immune system.
Step 2: Detailed Explanation:
1. Lactose Intolerance: The most common type, caused by a deficiency of the enzyme 'lactase', making it difficult to digest the sugar (lactose) found in milk and dairy.
2. Fructose Intolerance: Difficulty in digesting fructose, a sugar found in fruits, some vegetables, and honey.
3. Gluten Intolerance (Non-celiac): Sensitivity to gluten, a protein found in wheat, barley, and rye, leading to bloating and abdominal pain (distinct from Celiac disease).
Step 3: Final Answer:
The three types are Lactose, Fructose, and Gluten intolerance.