First introduced into the poultry industry in the 1980s, enzymes are now used in over 90% of all broiler diets. Feed enzyme application in diets for poultry is also one of the most researched fields in poultry science today, with over 2,500 independent enzyme trials conducted with broilers alone. Much of this research has been focussed on phytase and its mode of action. The penetration of carbohydrase and protease enzymes into poultry feed has been slower, particularly in markets that rely less on ‘viscous’ wheat and barley based diets. Luis Romero from Dupont compares and analyses several enzymes, the effects they have on poultry population, and as a result – more efficient production.