Food is composed of carbohydrates, proteins, fats, vitamins, minerals and water. The digestive enzymes secreted by the digestive system helps break down the complex nutrients into simpler form. The various enzymes secreted by the human body are:
Major Digestive Enzymes
| Enzyme | Produced In |
| Carbohydrate Digestion : | |
| Salivary amylase | Salivary glands |
| Pancreatic amylase | Pancreas |
| Maltase | Small intestine |
| Protein Digestion : | |
| Pepsin | Gastric glands |
| Trypsin | Pancreas |
| Peptidases | Small intestine |
| Nucleic Acid Digestion : | |
| Nuclease | Pancreas |
| Nucleosidases | Pancreas |
| Fat Digestion : | |
| Lipase | Pancreas |
