Alcohol laws are laws relating to manufacture, use, as being under the influence of and sale of alcohol (also known formally as ethanol) or alcoholic beverages. Common alcoholic beverages include beer, wine, (hard) cider, and distilled spirits (e.g., vodka, rum, gin). Definition of alcoholic beverage varies internationally, e.g., the United States defines an alcoholic beverage as "any beverage in liquid form which contains not less than one-half of one percent of alcohol by volume". Alcohol laws can restrict those who can produce alcohol, those who can buy it (often with minimum age restrictions and laws against selling to an already intoxicated person), when one can buy it (with hours of serving or days of selling set out), labelling and advertising, the types of alcoholic beverage that can be sold (e.g., some stores can only sell beer and wine), where one can consume it (e.g., drinking in public is not legal in many parts of the US), what activities are prohibited while intoxicated (e.g., drunk driving), and where one can buy it. In some cases, laws have even prohibited the use and sale of alcohol entirely.
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Drinking in public in the context of Legal drinking age
The legal drinking age is the minimum age at which a person can legally consume alcoholic beverages. The minimum age alcohol can be legally consumed can be different from the age when it can be purchased in some countries. These laws vary between countries and many laws have exemptions or special circumstances. Most laws apply only to drinking alcohol in public places with alcohol consumption in the home being mostly unregulated (one of the exceptions being England and Wales, which have a minimum legal age of five for supervised consumption in private places). Some countries also have different age limits for different types of alcohol drinks.
The majority of countries have a minimum legal drinking age of 18. The most commonly known reason for the law behind the legal drinking age is the effect on the brain in adolescents. Since the brain is still maturing, alcohol can have a negative effect on the memory and long-term thinking. Alongside that, it can cause liver failure, and create a hormone imbalance in teens due to the constant changes and maturing of hormones during puberty. Some countries have a minimum legal drinking age of 19 to prevent the flow of alcoholic beverages in high schools, while others like the United States have a minimum legal purchasing age of 21 (except in P.R. and USVI, where the drinking age is 18) in an effort to reduce the amount of drunk driving rates among teenagers and young adults.