Final answer:
Food in vending machines should be checked regularly for expiration at least once a week to ensure safety, quality, and stock rotation.
Step-by-step explanation:
Shelf Life Management for Vending Machines
Monitoring the shelf life of food in vending machines is essential to ensure the safety and quality of the products. The frequency of these checks will usually be determined by the type of foods offered and the manufacturer's expiration dates. However, it is a good practice to perform checks at least once a week. This helps to maintain high standards of food safety, prevent foodborne illnesses, and ensure consumer satisfaction.