Is insulin an enzyme or hormone?

Insulin:

1. Insulin is a hormone secreted by pancreatic beta cells.
2. It's a peptide hormone that promotes glycogenesis in target cells, or the conversion of glucose to glycogen.
3. It controls carbohydrate, lipid, and protein metabolism by boosting glucose absorption from the blood into the liver, fat, and skeletal muscle cells.
4. Insulin and glucagon are both pancreatic endocrine hormones that are released by the pancreas.
5. An insulin molecule contains 51 amino acids and 5808 Da molecular weight.