![Expiration](https://upload.wikimedia.org/wikipedia/commons/1/12/Expiration.jpg)
An expiration date or expiry date is a previously determined date after which something should no longer be used, either by
operation of law
The phrase "by operation of law" is a legal term that indicates that a right or liability has been created for a party, irrespective of the intent of that party, because it is dictated by existing legal principles. For example, if a person dies wi ...
or by exceeding the anticipated
shelf life
Shelf life is the length of time that a commodity may be stored without becoming unfit for use, consumption, or sale. In other words, it might refer to whether a commodity should no longer be on a pantry shelf (unfit for use), or no longer on a ...
for perishable goods. Expiration dates are applied to selected food products and to some other manufactured products like infant car seats where the age of the product may impact its safe use.
The legal definition and usage of terms will vary between countries and products.
Different terms may be used for products that tend to
spoil
Spoil or spoils:
*Plunder taken from an enemy or victim
*Material (such as rock, earth or other overburden) removed during:
**excavation
**mining
**dredging
Dredging is the excavation of material from a water environment. Possible reasons f ...
and those that tend to be
shelf-stable
Shelf-stable food (sometimes ambient food) is food of a type that can be safely stored at room temperature in a sealed container. This includes foods that would normally be stored refrigerated but which have been food processing, processed so th ...
.
The term ''Use by'' is often applied to products such as milk and meat that are more likely to spoil and can become dangerous to those eating them. Such products should not be consumed past the date shown.
The term ''Best before'' is often applied to products that may deteriorate slightly in quality, but are unlikely to become dangerous as a result, such as dried foods. Such products can be eaten after their ''Best before'' date at the discretion of the consumer.
Storage and handling conditions will affect whether and when an item will spoil, so there is inherent variability in dating.
Arbitrary expiration dates are also commonly applied by companies to product
coupons
In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product.
Customarily, coupons are issued by manufacturers of consumer packaged goods
or by retailers, to be used in r ...
, promotional offers and
credit cards
A credit card is a payment card issued to users (cardholders) to enable the cardholder to pay a merchant for goods and services based on the cardholder's accrued debt (i.e., promise to the card issuer to pay them for the amounts plus the o ...
. In these contexts, the expiration date is chosen for business reasons or to provide some security function rather than any product safety concern.
Expiration date is often abbreviated EXP or ED.
Terms
Use by
![FoilMilkBottleTop](https://upload.wikimedia.org/wikipedia/commons/2/2a/FoilMilkBottleTop.JPG)
Generally, foods that have a ''use by'' date written on the packaging should not be eaten after the specified date. This term is generally applied to foods that may go bad due to physical instability, chemical spoilage, bacterial spoilage, pathogenic spoilage, or other factors that can make the food injurious to health.
Milk
Milk is a white liquid food produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals (including breastfed human infants) before they are able to digestion, digest solid food. Immune factors and immune ...
,
meat
Meat is animal flesh that is eaten as food. Humans have hunted, farmed, and scavenged animals for meat since prehistoric times. The establishment of settlements in the Neolithic Revolution allowed the domestication of animals such as chic ...
,
fish
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...
and eggs are all subject to spoilage. Such foods should be thrown away if past their ''use by'' date or if showing signs of deterioration such as changes in smell or color.
Fruits
In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering.
Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particula ...
,
vegetables
Vegetables are parts of plants that are consumed by humans or other animals as food. The original meaning is still commonly used and is applied to plants collectively to refer to all edible plant matter, including the flowers, fruits, stems, ...
,
breads
Bread is a staple food prepared from a dough of flour (usually wheat) and water, usually by baking. Throughout recorded history and around the world, it has been an important part of many cultures' diet. It is one of the oldest human-made food ...
and other baked goods can also spoil, but may be less likely to become dangerous. It is important to follow storage and preparation instructions carefully for perishable foods. Some product may require
refrigeration
The term refrigeration refers to the process of removing heat from an enclosed space or substance for the purpose of lowering the temperature.International Dictionary of Refrigeration, http://dictionary.iifiir.org/search.phpASHRAE Terminology, ht ...
. Others may need to be cooked to particular temperatures.
Bathroom products and toiletries usually state a time in months from the date the product is opened, by which they should be used. This is often indicated by a
graphic of an open tub, with the number of months written inside (e.g., "12M" means use the product within 12 months of opening).
Similarly, some food products say "eat within X days of opening".
Best before
![Expiration Tag](https://upload.wikimedia.org/wikipedia/commons/a/ab/Expiration_Tag.jpg)
''Best before'' or ''best by'' dates appear on a wide range of frozen, dried, tinned and other foods. These dates are advisory and refer to the quality of the product, in contrast with ''use by'' dates, which may indicate that the product may no longer be safe to consume after the specified date. Food kept after the ''best before'' date will not necessarily be harmful, but may begin to lose its optimum flavour and texture.
Eggs can be a special case, since they may contain
salmonella
''Salmonella'' is a genus of rod-shaped (bacillus) Gram-negative bacteria of the family Enterobacteriaceae. The two species of ''Salmonella'' are ''Salmonella enterica'' and ''Salmonella bongori''. ''S. enterica'' is the type species and is fur ...
which multiplies over time; they should therefore be eaten before the ''best before'' date. In Britain, this is 21 days from when they were laid.
In the USA, this is a maximum of 45 days after the eggs are packed. Quality of the eggs will degrade over time, due to a variety of factors. As a result, some prefer to use fresher eggs for eating and eggs a few days old for cooking.
Sometimes the packaging process involves using pre-printed labels, making it impractical to write the ''best before'' date in a clearly visible location. In this case, wording like ''best before see bottom'' or ''best before see lid'' might be printed on the label and the date marked in a different location as indicated.
Open dating
''Open dating'' is the use of a date stamped on the package of a food product to help determine how long to display the product for sale. This benefits the consumer by ensuring that the product is of best quality when sold. An open date does not supersede a
use-by date, if shown, which should still be followed.
By country
Europe
As of 2020, the
European Food Safety Authority
The European Food Safety Authority (EFSA) is the agency of the European Union (EU) that provides independent scientific advice and communicates on existing and emerging risks associated with the food chain. EFSA was established in February 2002, ...
outlined a risk‐based approach for food business operators (FBO) to use in deciding the type of date marking to be used on different types of products, (i.e. ‘best before’ date or ‘use by’ date), determining a desirable shelf‐life (i.e. time) and identifying relevant content to be put on food labels to ensure food safety.
Great Britain
Great Britain has established legislation for Food Information Regulations. Best practices include the labeling of foods with either a ‘best before’ or a ‘use by’ date so that consumers can help to ensure the safety of their food and lessen the amount of consumer food waste.
Canada
An expiration date on food differs from a best-before date. According to the
Canadian Food Inspection Agency
The Canadian Food Inspection Agency (CFIA; french: Agence canadienne d'inspection des aliments) is a regulatory agency that is dedicated to the safeguarding of food, plants, and animals (FPA) in Canada, thus enhancing the health and well-being o ...
"Expiration dates are required only on certain foods that have strict compositional and nutritional specifications which might not be met after the expiration date."
In Canada expiration dates must be used on the following food items (list and comments copied from
CFIA website):
*formulated liquid diets (nutritionally complete diets for people using oral or tube feeding methods)
*foods represented for use in a very low-energy diet (foods sold only by a pharmacist and only with a written order from a physician)
*meal replacements (formulated food that, by itself, can replace one or more daily meals)
*nutritional supplements (food sold or represented as a supplement to a diet that may be inadequate in energy and essential nutrients)
*human milk substitutes (infant formula)
The concern is that after the expiration date has passed, the food may not have the same nutrient content as specified on the packaging and for the listed regulated products, the nutritional content is quite important. The CFIA recommends that food should be discarded and should not be bought, sold or eaten beyond the stated expiration date. This contrasts with a best before date which is an indication of how long properly stored prepackaged food is expected to retain its "freshness, taste, nutritional value, or any other qualities claimed by the manufacturer." Passing a best before date is not necessarily a reason to discard the food. "Sell by" and "manufactured on" dates are related concepts that may guide the consumer.
Non-food items may also carry an expiration date. For example, in Canada, all children are required to be secured in an
infant car seat
A child safety seat, sometimes called an infant safety seat, child restraint system, child seat, baby seat, car seat, or a booster seat, is a seat designed specifically to protect children from injury or death during vehicle collisions. Most c ...
while in a motor vehicle that is in motion. Users are required by law to follow manufacturer's directions. There is no specific law that requires an expiration date, but all
Transport Canada
Transport Canada (french: Transports Canada) is the department within the Government of Canada responsible for developing regulations, policies and services of road, rail, marine and air transportation in Canada. It is part of the Transportati ...
approved car seats sold in Canada carry
manufacturer applied expiration datethat ranges between 6 and 9 years from date of manufacture. The rationale is that car seats are subjected to heat, cold, sun exposure, abuse by the children, and long term storage between children, all of which can degrade the structure and function of the car seat and fail in a crash. Further, beyond the expiration date the manufacturer will no longer be monitoring the safety of the seat through testing. Transport Canada advises to destroy an expired car seat and dispose of it at a landfill or recycling facility, and never to give an expired seat to someone else or to charity.
United States
The
Food and Drug Administration
The United States Food and Drug Administration (FDA or US FDA) is a List of United States federal agencies, federal agency of the United States Department of Health and Human Services, Department of Health and Human Services. The FDA is respon ...
in the United States notes that "
principle of U.S. food law is that foods in U.S. commerce must be wholesome and fit for consumption". However, with the exception of infant formula, the United States government does not require or specify uniform terminology for use on food labels, the use of date labeling is entirely at the discretion of the manufacturer, and dates on labels do not indicate product safety. U.S. law does state that labels should be truthful and not misleading. Specific foods may be subject to regulations from the Food Safety and Inspection Service.
Most U.S. expiration dates are used as guidelines based on normal and expected handling and exposure to temperature. Use prior to the expiration date does not guarantee the safety of a food or drug, and a product is not necessarily dangerous or ineffective after the expiration date. According to the
United States Department of Agriculture
The United States Department of Agriculture (USDA) is the United States federal executive departments, federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, ...
, "canned foods are safe indefinitely as long as they are not exposed to freezing temperatures, or temperatures above 90 °F (32.2° C). If the cans look okay, they are safe to use. Discard cans that are dented, rusted, or swollen. High-acid canned foods (tomatoes, fruits) will keep their best quality for 12 to 18 months; low-acid canned foods (meats, vegetables) for 2 to 5 years". .
"Sell by date" is a less ambiguous term for what is often referred to as an "expiration date". Most food is still edible after the expiration date.
[''See'' ] A product that has passed its shelf life might still be safe, but quality is no longer guaranteed. In most food stores, waste is minimized by using
stock rotation
Stock rotation is a way of mitigating stock loss. It is the practice, used in hospitality and retail, especially in food stores such as restaurants and supermarkets, of moving products with an earlier sell-by date to the front of a shelf (or in t ...
, which involves moving products with the earliest sell by date from the warehouse to the sales area, and then to the front of the shelf, so that most shoppers will pick them up first and thus they are likely to be sold before the end of their shelf life. This is important, as consumers enjoy fresher goods, and furthermore some stores can be fined for selling out of date products; most if not all would have to mark such products down as
wasted
Wasted may refer to:
Arts, entertainment, and media Literature
*'' Wasted: Tales of a GenX Drunk'', a 1997 memoir by Mark Judge
*'' Wasted: A Memoir of Anorexia and Bulimia'', a 1998 autobiography by Marya Hornbacher
*'' Wasted: A Childhood Sto ...
, resulting in a financial loss.
The expiration date of pharmaceuticals specifies the date the manufacturer guarantees the full potency and safety of a drug. Most medications continue to be effective and safe for a time after the expiration date. A rare exception is a case of renal tubular acidosis purportedly caused by expired
tetracycline
Tetracycline, sold under various brand names, is an oral antibiotic in the tetracyclines family of medications, used to treat a number of infections, including Acne vulgaris, acne, cholera, brucellosis, plague (disease), plague, malaria, and sy ...
. A study conducted by the U.S. Food and Drug Administration covered over 100 drugs, prescription and over-the-counter. The study showed that about 90% of them were safe and effective as long as 15 years past their expiration dates. Joel Davis, a former FDA expiration-date compliance chief, said that with a handful of exceptions - notably nitroglycerin, insulin and some liquid antibiotics - most expired drugs are probably effective.
Further reading
* Europe
**
* United States
** Includes a list of the many terms used in the United States food industry.
** Labuza, T. P., Szybist, L., ''Open dating of Foods'', Food and Nutrition Press, 2001; other edition: Wiley-Blackwell, 2004,
References
{{Reflist
Food safety
Drug safety
*
Product safety