Expiration dates are required only on certain foods that have strict compositional and nutritional specifications which might not be met after the expiration date.
Expiration dates must be used on the following products: After the expiration date, the food may not have the same nutrient content declared as on the label.
If specific storage conditions are required in order for a product to keep until its best before or use by date, suppliers must include this information on the label, e.g. You should also follow any directions for use or cooking instructions that the supplier has put on the label.
Information about dates on pre-packaged food is a valuable source of information for consumers.
Food should not be bought, sold or eaten if the expiration date has passed. The Food and Drug Regulations state the terms "use by" and "employez avant" may replace "best before" for prepackaged fresh yeast only.