Most people associate digestion only with the stomach, while the digestive system consists of a dozen or so elements, and most digestive enzymes are formed in the pancreas. What are digestive enzymes? They are substances that break down proteins, fats and carbohydrates contained in food and drink into the simplest forms, eg amino acids or sugars. These forms are then transported through the small intestine to the bloodstream, from where they are distributed as fuel for your body.
We distinguish three main types of digestive enzymes:
The small intestine produces three additional enzymes - lactase, maltase and saccharase (not to be confused with sucrose ?)
If your body does not produce enough digestive enzymes, food particles can not be properly digested. This leads to digestive problems, such as lactose intolerance.
Salivary glands, pancreas and small intestine produce amylases. One of the types of amylase, ptialina, is formed in the salivary glands and begins to digest starches (complex sugars) already when you chew your mouth. For this reason, nutritionists recommend carefully biting food - you give time to amylase for your work.
Pancreatic enzymes arise in the pancreas and then enter the small intestine. There, they break down starch molecules into sugars, and then other enzymes break down sugars into glucose. Then, the wall of the small intestine absorbs glucose, which goes to the circulatory system.
In turn, the stomach, pancreas and small intestine produce proteases. Most chemical reactions occur in the stomach and small intestine. In the stomach, pepsin is the main digestive enzyme that digestes proteins. When protein molecules reach the small intestine, other pancreatic enzymes get to work.
The pancreas and small intestine produce lipases. They are also produced by a breastfeeding mother, so that the infant can digest fat molecules more easily in breast milk. Fats play many roles - from feeding cells to maintaining energy for a long time.
However, you can also provide digestive enzymes from the outside - from food.
Pineapples are the source of bromelain, which belongs to the group of proteases. Proteases break down proteins into smaller molecules - amino acids that are easily digested and absorbed. Scientific research has shown that the addition of bromelain to pancreatic enzymes increases their effectiveness in people with pancreatic insufficiency. 
Another tropical fruit rich in digestive enzymes. Like pineapples, papaya is a source of proteases that help digest proteins. However, these proteases have a different name, derived from their source - papain. Studies show that papain reduces the amount of gas and bloating in people with IBS, a disease that causes alternating diarrhea and constipation under stress. 
We stay with tropical fruits. Mango contains digestive enzymes from the group of amylases that break down carbohydrates from starch into simple sugars, such as glucose and maltose. Amylases in mango increase their strength with the ripening of the fruit, which is why it becomes sweeter with time.
Unusual fruit, because it contains a lot of healthy fats, and few sugars. Avocado is perfect in salads, where it emphasizes the taste of other ingredients and gives a feeling of fullness for a long time. As befits a fat fruit, avocado contains lipase, which breaks down fat molecules into fatty acids and glycerol, which the body absorbs more easily. Your body can produce lipase by itself, but with a high-fat diet or after a long celebration at the table, additional lipase can be useful. According to a 2015 study, a lipase supplement reduces the feeling of fullness, bloating and nausea after a fatty meal. 
If you want to improve digestion, turn to nature. Get to know fruits and herbs that contain digestive enzymes or increase their secretion and feel comfortable in every situation.