Factors including the length of time and the temperature at which a food is held during distribution and offered for sale, the characteristics of the food, and the type of packaging will affect how long a product will be of optimum quality.Manufacturers and retailers will consider these factors when determining the date for which the product will be of best quality.It is also based on the conditions of handling, storage, preparation, and use printed on the label.
Except for infant formula, dates are not an indicator of the product’s safety and are not required by Federal law.
[Top of Page] How do Manufacturers Determine Quality Dates?
Foods not exhibiting signs of spoilage should be wholesome and may be sold, purchased, donated and consumed beyond the labeled "Best if Used By" date.
[Top of Page] Safety After Date Passes With an exception of infant formula (described below), if the date passes during home storage, a product should still be safe and wholesome if handled properly until the time spoilage is evident (Chill Refrigerate Promptly).
There are two types of bacteria that can be found on food: pathogenic bacteria, which cause foodborne illness, and spoilage bacteria, which cause foods to deteriorate and develop unpleasant characteristics such as an undesirable taste or odor making the food not wholesome, but do not cause illness.
When spoilage bacteria have nutrients (food), moisture, time, and favorable temperatures, these conditions will allow the bacteria to grow rapidly and affect the quality of the food.Spoiled foods will develop an off odor, flavor or texture due to naturally occurring spoilage bacteria.If a food has developed such spoilage characteristics, it should not be eaten.[Top of Page] Dating Infant Formula Federal regulations require a "Use-By" date on the product label of infant formula under inspection of the U. Formula must maintain an acceptable quality to pass through an ordinary bottle nipple.The "Use-By" date is selected by the manufacturer, packer or distributor of the product on the basis of product analysis throughout its shelf life, tests, or other information."Open Dating" is a calendar date applied to a food product by the manufacturer or retailer.