The end product of chemical digestion of proteins are amino acids.

Here's a breakdown:

* Proteins are long chains of amino acids linked together.

* Chemical digestion breaks down these long chains into individual amino acids.

* This process is facilitated by enzymes like pepsin (in the stomach) and trypsin and chymotrypsin (in the small intestine).

* Amino acids are then absorbed into the bloodstream and transported to cells throughout the body, where they are used to build and repair tissues, make enzymes and hormones, and provide energy.