HUMAN NUTRITION

Detailed explanation-1: -For proteins, it is the enzyme pepsin that digests them. Pepsin is secreted by the stomach chief cells in the stomach along with hydrochloric acid. Thus, protein digestion occurs in the stomach of the human digestive tract. Proteins are the most complex molecules and undergo further digestion in the small intestine.

Detailed explanation-2: -Protein digestion begins when you first start chewing. There are two enzymes in your saliva called amylase and lipase. They mostly break down carbohydrates and fats. Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids.