Enzymes are proteins that aid the thousands of biochemical reactions that take place within and outside of your cells.The structure of enzymes allows them to combine with other molecules inside the cell called substrates, which catalyze reactions that are essential to your metabolism.Enzymes may also function outside the cell, such as digestive enzymes like lactase and sucrase, which help digest sugar.

Some enzymes require other molecules, such as vitamins or minerals, for a reaction to take place.

Bodily functions that depend on enzymes include :

• Digestion
• Energy production
• Blood clotting
• Muscle contraction