15. Industrial Enzymes as Feed Supplements—Advantages to Nutrition and Global Environment

The relevance of enzyme fortification in animal feeds has been well established and exploited to generate a high income generating sector of industrial enzymes. Apart from aiding the better nutritional uptake and utility of the food constituents from the animal feed, the economic benefits gained by the production of better meat yield from livestock has prompted the acceptability of these enzymes in the feedstock. The current review outlines the various types of enzymes supplemented in animal feeds, their functional role and advantages of feed enzymes on animal growth and productivity. The effectiveness of feed enzymes in reducing the release of unused residual metabolites into the environment and the contributory role of these enzymes in diminishing the aftermaths of global warming are also discussed. The various strategies adopted in the individual and combinatorial generation of feed enzymes, their substrates and the characteristics of such feed enzymes are also presented in a concise manner. Finally, the advancements in the industrial production of feed enzymes and its supplementation are reviewed.