What is the purpose of pasteurization in dairy processing?

• A. To sterilize the product completely.
• B. To achieve the necessary microbial inactivation while preserving product quality.
• C. To replace refrigeration entirely.
• D. To remove all flavor compounds.

Answer: (B)

Pasteurization is about safety without sacrificing quality. It’s designed to inactivate disease-causing and many spoilage microorganisms so the milk is safer to drink and lasts longer, but it doesn’t aim to sterilize the product completely. That balance—reducing harmful microbes while preserving flavor, nutrients, and overall quality—is what pasteurization seeks to achieve.

That’s why the best description is the one that says you achieve the necessary microbial inactivation while preserving product quality. The other ideas aren’t the goal: sterilization would require far more heat and would harm taste and nutrients; pasteurization doesn’t replace refrigeration, since cold storage is still needed to slow any remaining or new microbial growth; and removing all flavor compounds isn’t what pasteurization is about, though some mild flavor changes can occur.