Where are carbohydrates lipids and proteins broke down in the GI tract?
Carbohydrates and proteins are digested in the stomach. Carbs
require several enzymes to be digested, such as the enzyme salivary
amylase (secreted in the mouth); digestion ultimately occurs at the
level of the stomach. Proteins are also digested in the stomach,
but require a general class of enzymes called proteases in order to
be digested. Lipids are digested in the duodenum, the first portion
of the small intestine. The secretion of lipase enzymes is
necessary to complete this task.