Lena Savoie
Alcohol misuse, which includes binge drinking and heavy drinking, increases the risk of alcohol use disorder (AUD) and other alcohol-related problems. While the number of drinks per day that qualifies as alcohol misuse varies depending on the source, the consensus is that men should consume fewer drinks per day than women. For example, the 2020-2025 US Dietary Guidelines state that men should have no more than two drinks per day, while women should have no more than one. Binge drinking is typically defined as consuming four or more drinks for women and five or more for men within about two hours. Heavy drinking is defined as binge drinking plus drinking for women and 15 or more drinks for men per week. Excessive drinking can lead to immediate and long-term health issues, including an increased risk of certain cancers, liver disease, mental health conditions, and memory problems. It is important to note that even moderate drinking can have negative health effects, and the risk of alcohol-related harm increases with the amount consumed.
| Characteristics | Values |
|---|---|
| Number of drinks for women per day | 1 or less |
| Number of drinks for men per day | 2 or less |
| Number of drinks for women per week | 8 or less |
| Number of drinks for men per week | 15 or less |
| Binge drinking for women | 4 or more drinks in about 2 hours |
| Binge drinking for men | 5 or more drinks in about 2 hours |
| High-intensity drinking for women | 8 or more drinks |
| High-intensity drinking for men | 10 or more drinks |
| Heavy drinking for women | 4 or more drinks per day or 8 or more per week |
| Heavy drinking for men | 5 or more drinks per day or 15 or more per week |
| Alcohol misuse | Drinking in a manner, situation, amount, or frequency that could cause harm to the person who drinks or to those around them |
| Alcohol use disorder (AUD) | Craving the next drink, impaired ability to stop or control alcohol use, mild, moderate or severe |
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What You'll Learn
Binge drinking
The developing adolescent brain is particularly susceptible to the neurotoxic effects of binge drinking, with evidence of brain damage occurring from drinking more than 10 or 11 drinks once or twice per month. A single episode of binge drinking can lead to atrophy of the brain's corpus callosum, with damage still detectable by MRI five weeks later. Binge drinking is more common among males during adolescence and young adulthood. Rates of binge drinking among young people are decreasing but remain high (28.7% in 2023). Approximately one in four women in the United States has engaged in binge drinking in the last month, with an average of about three binge episodes per month and five drinks per binge episode.
It is important to note that drinking guidelines recommend limiting alcohol intake to one drink or less for women and two drinks or less for men on any single day. These guidelines aim to reduce, but not eliminate, the risks associated with alcohol consumption. Even one drink per day can increase a woman's risk of breast cancer by 5% to 15% compared to non-drinkers. Additionally, drinking during pregnancy increases the risk of fetal alcohol spectrum disorders, and individuals with certain health conditions or medications should also avoid alcohol to minimise risks.
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Heavy drinking
The National Institute on Alcohol Abuse and Alcoholism (NIAAA) defines heavy drinking for women as consuming four or more drinks on any day or eight or more drinks per week. For men, heavy drinking is defined as consuming five or more drinks on any day or 15 or more drinks per week. These thresholds are lower for women because alcohol distributes itself evenly in body water, and women have proportionally less water in their bodies than men. As a result, a woman's blood alcohol concentration (BAC) tends to be higher after consuming the same amount of alcohol as a man, putting her at greater risk for harm.
Binge drinking is a form of heavy drinking that brings a person's BAC to 0.08% or higher. This typically occurs when a woman consumes four or more drinks or a man consumes five or more drinks within about two hours. High-intensity drinking is another form of heavy drinking, defined as consuming twice the binge drinking thresholds, which equates to eight or more drinks for women and 10 or more drinks for men.
The risks associated with heavy drinking include an increased likelihood of alcohol-related harms, such as injuries, violence, alcohol poisoning, and overdose, and health issues such as liver disease and mental health conditions. Research has also shown a link between alcohol consumption and certain types of cancer, including breast cancer in women. Even one drink per day can increase a woman's risk of breast cancer by 5% to 15% compared to non-drinkers.
It is important to note that the effects of heavy drinking depend on various factors, including the amount consumed, the speed of consumption, and drinking frequency. Additionally, individual characteristics such as body composition, age, and genetic variants can influence the impact of alcohol on a person's health. While some individuals may not experience issues with heavy drinking, it is generally recommended to limit alcohol consumption or abstain completely to minimise health risks.
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Alcohol use disorder (AUD)
Alcohol is the most commonly used substance in the United States, with 84% of people over 18 reporting lifetime alcohol use. However, alcohol misuse, which includes binge drinking and heavy alcohol use, increases the risk of developing Alcohol Use Disorder (AUD). AUD is a chronic brain disease that can go into remission but has no cure. It is characterised by an impaired ability to stop or control alcohol use despite adverse social, occupational, or health consequences. AUD can be mild, moderate, or severe, with severity depending on the number of symptoms present.
The 2020-2025 US Dietary Guidelines state that women should have one drink or less per day, and men should have no more than two drinks per day. Binge drinking is defined as consuming four or more drinks for women and five or more for men within about two hours. Heavy drinking is defined as binge drinking for women at least eight times per week and for men, at least 15 times per week. High-intensity drinking is defined as drinking at two or more times the binge drinking thresholds.
People with AUD may continue to drink alcohol despite knowing it causes social, health, economic, and legal problems. They may also experience intense cravings for alcohol and require greater quantities to achieve the same effect, a phenomenon known as tolerance. AUD can cause negative consequences that impact relationships, physical and mental health, and the ability to fulfil obligations.
The specific causes of AUD are not fully understood, but twin and adoption studies suggest that approximately 50% of the liability is genetic, with the remaining 50% attributed to environmental factors. AUD is a treatable disease, with appropriate medications and behavioural therapies available to support recovery.
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Alcohol tolerance
Several factors influence alcohol tolerance. Firstly, direct alcohol tolerance is largely dependent on body size. Larger-bodied people will generally require more alcohol to reach insobriety than lightly built people. Additionally, higher body weight and the prevalence of high levels of alcohol dehydrogenase, an enzyme responsible for breaking down alcohol in the liver and bloodstream, can increase alcohol tolerance. However, it's important to note that atypical alcohol dehydrogenase levels are less frequent in alcoholics than in non-alcoholics.
Ethnicity also plays a role in alcohol tolerance, as different alcohol tolerance levels exist between various ethnic groups. For example, Native Americans have a higher probability of developing an alcohol use disorder (AUD) compared to Europeans and Asians, and there are also differences in tolerance between Asian groups, such as between Chinese and Koreans.
Socio-economic and cultural differences, including diet, average body weight, and patterns of consumption, can also influence alcohol tolerance. For instance, the health benefits of modest alcohol consumption reported in people of European descent do not appear to extend to people of African descent.
It's important to note that building alcohol tolerance is a step towards physical addiction, and tolerance levels can be lowered by abstaining from alcohol for a significant amount of time. According to the U.S. Dietary Guidelines, adults who choose to drink alcohol should limit their intake to one drink or less per day for women and two drinks or less per day for men. Binge drinking, defined as consuming four or more drinks for women and five or more for men within about two hours, significantly increases the risk of alcohol-related harm. Heavy drinking, which includes binge drinking, is defined as consuming four or more drinks per day or eight or more per week for women, and five or more drinks per day or 15 or more per week for men.
While there is no universally accepted standard for what constitutes an alcoholic, drinking patterns that meet the criteria for heavy drinking significantly increase the likelihood of AUD and other alcohol-related harms.
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Health risks
According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), drinking patterns that are considered "heavy" markedly increase the likelihood of alcohol use disorder (AUD) and other alcohol-related harms. For women, this means consuming four or more drinks on any day or eight or more per week, and for men, it's defined as five or more drinks on any day or 15 or more per week. Binge drinking, a pattern that falls under heavy drinking, is characterised by a blood alcohol concentration of 0.08% or more, typically resulting from consuming four or more drinks for women and five or more drinks for men within a two-hour window.
Excessive alcohol consumption is associated with a multitude of health risks that can impact various organs and body systems, leading to over 200 health conditions. Here are some of the critical health risks associated with alcohol misuse:
Cardiovascular Risks
Acute and chronic alcohol use have been linked to arrhythmias, even in individuals without a prior history of atrial fibrillation (AF) or structural heart disease. Even drinking less than one drink per day can increase the risk of AF, and binge drinking episodes can lead to acute arrhythmias like "holiday heart syndrome." Chronic heavy drinking also increases the likelihood of developing AF over time.
Cancer
Alcohol is a known carcinogen, increasing the risk of cancers in the oral cavity, pharynx, larynx, oesophagus, colon, rectum, liver, and female breast. The risk of breast cancer, in particular, rises with alcohol consumption, even at levels as low as one drink per day.
Mental Health
Alcohol misuse has been associated with adverse effects on mental health, including an increased risk of self-harm and suicide. Excessive drinking can also worsen pre-existing mental health conditions, such as depression and anxiety.
Digestive Problems
Alcohol consumption can lead to digestive issues, including problems with the gut and pancreas, and can make it challenging to manage other health conditions, such as recurrent lung infections.
Fetal Alcohol Spectrum Disorders (FASD)
Alcohol use during pregnancy can result in FASD, causing lifelong physical, behavioural, and cognitive impairments in the child due to prenatal alcohol exposure.
Other Health Risks
Alcohol misuse can also contribute to high blood pressure, liver disease, memory problems (including dementia), weakened immune system, relationship issues, and increased susceptibility to injuries, violence, and alcohol poisoning.
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Frequently asked questions
According to the 2020-2025 U.S. Dietary Guidelines, women should have one drink or less in a day. However, heavy drinking for women is defined as four or more drinks on any day.
According to the 2020-2025 U.S. Dietary Guidelines, men should have two drinks or less in a day. However, heavy drinking for men is defined as five or more drinks on any day.
AUD is a medical condition characterised by an impaired ability to stop or control alcohol use despite adverse social, occupational, or health consequences. Symptoms of AUD include cravings, loss of control, and a negative emotional state when unable to drink.
