Does the adult stomach digest fat or carbohydrates?

The adult stomach primarily digests proteins, not fats or carbohydrates. While some fat digestion begins in the stomach through the action of gastric lipase, the major breakdown of fats occurs in the small intestine with the help of bile and pancreatic enzymes. Carbohydrate digestion mainly occurs in the mouth with salivary amylase and continues in the small intestine. Therefore, the stomach's role in digesting fats and carbohydrates is minimal compared to its role in protein digestion.