Food intolerances occur when the body has difficulty digesting certain foods, leading to uncomfortable symptoms. Unlike food allergies, which involve the immune system, food intolerances typically result from a lack of specific enzymes needed to break down certain substances. Common examples include lactose intolerance, where individuals struggle to digest lactose found in dairy products, and gluten intolerance, which affects those who cannot properly process gluten in wheat. Symptoms of food intolerances can vary widely and may include bloating, gas, stomach cramps, and fatigue. These reactions can happen hours or even days after consuming the offending food, making it challenging to identify the cause. Keeping a food diary can help individuals track their symptoms and pinpoint which foods may be causing issues.