Veterinary Drug Handbook (VDH) is the reference veterinarians turn to when they want an independent source of information on the drugs that are used in veterinary medicine today.


Enzymes

Enzymes are special proteins produced by cells which cause chemical changes in other substances, but which are not themselves changed in the process. A substance that makes a chemical process faster. For example digestive enzymes break down food to hasten the process of digestion.
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