What foods can humans not digest?

Here are some examples of foods that humans typically have difficulty digesting:

- Lactose: This is the natural sugar found in milk and dairy products. Many people are lactose intolerant, which means they have difficulty digesting lactose and may experience symptoms such as gas, bloating, diarrhea, and abdominal discomfort.

- Fructose: This is a type of simple sugar found in fruits, honey, and some sweeteners. Some people may have difficulty digesting fructose, which can lead to symptoms such as gas, bloating, diarrhea, and abdominal pain.

- Fiber: Dietary fiber is an essential nutrient, but it can be difficult for some people to digest. Fiber is found in fruits, vegetables, whole grains, and legumes. Some people may experience gas, bloating, and constipation when they consume large amounts of fiber.

- Gluten: This is a protein found in wheat, rye, and barley. People with celiac disease or gluten sensitivity cannot digest gluten and may experience symptoms such as abdominal pain, bloating, diarrhea, weight loss, and fatigue.

- Certain types of fats: Some types of fats, such as those found in fried foods and processed meats, can be difficult to digest and may cause symptoms such as nausea, vomiting, and diarrhea.

- Artificial sweeteners: Some artificial sweeteners, such as sorbitol, mannitol, and xylitol, can cause digestive problems such as gas, bloating, and diarrhea.