Digestive enzymes, found in the digestive tract, are enzymes which break polymeric macromolecules down into small building blocks for digestion.
 
 
Recommended Resources
Enzymes, Digestive Enzymes, and Enzyme Supplements
Article contains an explanation as to how enzymes work in the body naturally and via supplements, as well as the benefits of nutritional emzyme therapy, of which it offers various methods.
http://www.herbalremedies.com/enzymes.html
From a student of nutrition comes this site comes information about enzymes as they are obtained in raw foods, their vulnerability to heat, and the effect of raw food versus cooked food on the immune system.
http://www.healingdaily.com/detoxification-diet/enzymes.htm
The Eight Digestive Enzymes For Optimum Health
This portion of a two-part presentation about the power of digestive enzyes, beginning with a description of protease and how one can get it in both the diet or supplements. Additional information is to be had about amylase, lipase, and cellulase.
http://www.healthrecipes.com/enzymes_health.htm