Vivian Marlowe
Alcohol is a toxic, psychoactive, and dependence-producing substance, and there is no safe level of alcohol consumption that does not affect health. The World Health Organization (WHO) has published a statement in The Lancet Public Health that alcohol consumption of any amount can increase the risk of cancer, with alcohol causing at least seven types, including bowel and female breast cancer. The WHO's SAFER initiative provides technical guidelines for alcohol control and aims to reduce harmful alcohol consumption by 10% by 2025. While there is no guaranteed safe amount, general guidelines can help minimize risks, such as the Dietary Guidelines for Americans, which recommends that adults who choose to drink alcohol should limit intake to one drink or less for women and two drinks or less for men on any single day. Determining a safe limit for alcohol consumption is challenging, and excessive drinking is always risky, with health risks including cardiovascular diseases, cancers, cirrhosis of the liver, diabetes, and alcohol use disorders.
| Characteristics | Values |
|---|---|
| Safe level of alcohol consumption | No level of alcohol consumption is safe for health |
| Risks | Cancer, heart disease, hypertension, arrythmias, injuries, death |
| Guidelines | Adults should not drink alcohol or drink in moderation if they choose to drink |
| Drinking patterns | Drinking patterns vary by country and sex, with 63% of global drinkers being male in 2016 |
| Standard drink | Defined as 10 grams of pure alcohol, consumed by a person daily |
| Examples | Small glass of red wine (100 ml) at 13% ABV; can or bottle of beer (375 ml) at 3.5% ABV; shot of whiskey (30 ml) at 40% ABV |
| Binge drinking | Reaching a BAC of 0.08% or higher, typically after 4 or more drinks for women and 5 or more for men in 2 hours |
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What You'll Learn
There is no safe level of alcohol consumption
Alcohol is a toxic, psychoactive, and dependence-producing substance. It has been classified as a Group 1 carcinogen by the International Agency for Research on Cancer, alongside asbestos, radiation, and tobacco. This classification is the highest-risk group. As such, there is no safe level of alcohol consumption.
Ethanol (alcohol) causes cancer through biological mechanisms as the compound breaks down in the body. This means that any beverage containing alcohol poses a risk of developing cancer. In 2016, nearly 3 million deaths globally were attributed to alcohol use, including 12% of deaths in males aged 15-49. The health risks associated with alcohol are massive, including premature death, cancer, and cardiovascular problems. Even low levels of alcohol consumption have been associated with greater risks of hypertension, arrhythmias, and cancers of the mouth, throat, and female breast.
The World Health Organization (WHO) has stated that there is no safe amount of alcohol consumption that does not affect health. This statement is supported by a 2021 study that estimated the number of incident cancers attributable to alcohol consumption in the EU in 2017. The study found that light to moderate drinking (1-2 drinks per day) was responsible for 23,300 new cases of cancer. Additionally, the WHO has found that disadvantaged and vulnerable populations have higher rates of alcohol-related death and hospitalization. The harms from a given amount and pattern of drinking are higher for poorer drinkers and their families than for richer drinkers.
While some studies have suggested that moderate drinking may have potential beneficial effects on cardiovascular diseases and type 2 diabetes, these findings are highly debated. More recent studies show that there are no health benefits of moderate drinking compared to not drinking. Many past studies did not consider other factors that could have influenced the results, such as genetic factors, exercise, diet, or tobacco use.
It is important to note that the less alcohol consumed, the better. For those who do not currently drink, it is recommended that they do not start. Drinking less alcohol or abstaining entirely is the best way to lower health risks associated with alcohol consumption.
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Alcohol is a toxic, psychoactive, and dependence-producing substance
Alcohol is classified as a Group 1 carcinogen, the highest-risk group, by the International Agency for Research on Cancer. It causes cancer through the breakdown of ethanol in the body, and any beverage containing alcohol poses a risk of developing cancer. The risk of cancer increases with the amount of alcohol consumed, and even low levels of alcohol consumption have been linked to an increased risk of certain cancers. In addition to cancer, excessive alcohol consumption is associated with other negative health effects, including liver disease, cardiovascular disease, and brain damage.
Alcohol is also a psychoactive substance, which means it interacts with the central nervous system and changes how the brain responds to stimuli. It is typically classified as a depressant because it slows down a person's thinking and responses, but it can also reduce a person's ability to think rationally and impair judgment. The effects of alcohol can vary depending on the amount consumed, the frequency of drinking, and individual characteristics such as age, sex, and health status.
Alcohol can be addictive, and the development of alcohol dependence and withdrawal symptoms upon cessation are well-documented. The World Health Organization (WHO) has stated that there is no safe level of alcohol consumption when it comes to health, and that the risk to health starts from the first drop of any alcoholic beverage. This is supported by research, which has found that even moderate drinking may increase the overall risk of death and chronic disease.
While some studies have suggested potential protective effects of light to moderate drinking on cardiovascular diseases and type 2 diabetes, these findings are debated and may not consider all relevant factors. The WHO Global alcohol action plan 2022-2030 aims to reduce the harmful use of alcohol through effective strategies at the global, regional, and national levels.
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Alcohol-related harms and risks
Alcohol is a toxic, psychoactive, and dependence-producing substance. It has been classified as a Group 1 carcinogen, which includes asbestos, radiation, and tobacco. Even low levels of alcohol consumption can cause harm and carry some risks. The level of risk depends on several factors, including the amount consumed, frequency of drinking, the health status of the individual, age, sex, and other personal characteristics. The more alcohol is consumed, the higher the risk of developing cancer. Alcohol consumption increases the risk of several cancers, including bowel, breast, liver, head and neck, oesophageal, and colorectal cancers. In 2019, 4.4% of cancers diagnosed globally and 401,000 cancer deaths were attributed to alcohol consumption.
Excessive alcohol use can have immediate and long-term effects on the body. Heavy drinking can disturb the endocrine system, disrupting the hormones that help maintain the body's stability and health. It can also cause deficiencies in specific blood components, including anemia, leukopenia, thrombocytopenia, and macrocytosis. Alcohol misuse is linked to peripheral neuropathy, which can cause numbness in the arms and legs and painful burning in the feet. It can also lead to heart arrhythmias, postural or orthostatic hypotension, and diarrhea. Heavy drinking raises the risk for ischemic heart disease and myocardial infarction (heart attack). It can also increase the risk for developing type 2 diabetes due to increased body weight, blood triglyceride levels, or blood pressure.
Binge drinking is defined as reaching a blood alcohol concentration (BAC) of 0.08% or higher. A typical adult reaches this BAC after consuming four or more drinks (women) or five or more drinks (men) in about two hours. Binge drinking can increase the risk of getting sick, injured, or dying sooner. Alcohol consumption can also have a significant impact on those around the drinker, with many alcohol-related injuries and deaths caused by someone else's drinking. Alcohol-related injuries include road traffic accidents, falls, drowning, burns, sexual assault, intimate partner violence, and suicide.
While there is no guaranteed safe amount of alcohol for anyone, general guidelines can help minimize the risks. The Dietary Guidelines for Americans recommend that adults of legal drinking age (21 or older) should not drink alcohol or drink in moderation if they choose to drink. Drinking less is better for one's health than drinking more. Lowering alcohol consumption can reduce the risk of alcohol-related harms.
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Alcohol consumption guidelines and their impact
On January 4, 2023, the World Health Organization (WHO) stated that there is no "safe" level of alcohol consumption that does not affect health. This statement was based on the systematic evaluation of the risks and harms associated with drinking alcohol, which are well-documented. Alcohol is a toxic, psychoactive, dependence-producing substance and has been classified as a Group 1 carcinogen, the highest-risk group, by the International Agency for Research on Cancer. It causes at least seven types of cancer, including common ones such as bowel and female breast cancer. Even low levels of alcohol consumption have been linked to an increased risk of certain cancers, hypertension, arrhythmias, and other health issues.
The WHO's statement has significant implications for the alcohol beverage industry, which may face stricter regulations and public outcry similar to what the tobacco industry experienced. In response to the WHO's guidance, Canada revised its recommendations for alcohol consumption in 2023, stating that zero alcohol consumption is the only risk-free approach. Other countries are expected to follow suit and adopt the WHO's guidelines.
The impact of the WHO's statement is also felt at the individual level, as people reevaluate their drinking habits. The National Institute on Alcohol Abuse and Alcoholism (NIAAA) in the United States provides general guidelines to help clinicians advise their patients on minimizing risks associated with alcohol consumption. These guidelines recommend limiting intake to one drink or less for women and two drinks or less for men on any single day, not as an average. However, even drinking within these limits does not significantly reduce the risk of all-cause mortality, according to a recent systematic review and meta-analysis.
The United Kingdom also released low-risk drinking guidelines in 2018, stating that there is “no safe level of alcohol consumption” due to the increased risk of cancer. They recommended that regular drinkers, regardless of gender, should consume no more than 14 units of alcohol per week. This is equivalent to about 100 grams of alcohol per week, which was the threshold for the lowest risk of all-cause mortality in a comprehensive study by Wood et al. in 19 high-income countries.
Overall, the current consensus is that when it comes to alcohol consumption, the less, the better. For those with a strong family history of cancer or alcohol use disorder, abstaining from alcohol may be the best option to minimize risk. The myth that one or two drinks a day are good for health has been shattered by recent studies, and there is a growing recognition of the need to encourage reduced alcohol consumption, especially in young and older adults with co-morbid conditions.
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Alcohol use disorders and addiction
Alcohol is a toxic, psychoactive, and dependence-producing substance. It is a Group 1 carcinogen, which is the highest-risk group that also includes asbestos, radiation, and tobacco. According to the World Health Organization, there is no safe amount of alcohol consumption that does not impact one's health. Any amount of alcohol consumption increases the risk of developing cancer, including the most common types such as bowel and female breast cancer.
Despite the well-known risks and harms associated with alcohol, the question of its potential beneficial effects has been a contentious issue in research. Some past studies have suggested that light to moderate drinking may have positive impacts on cardiovascular health and type 2 diabetes. However, these findings have been highly debated, and more recent studies indicate that there are no health benefits associated with moderate drinking compared to abstinence. The protective effects of light to moderate alcohol consumption suggested by some studies may be influenced by the comparison groups chosen and the statistical methods employed, potentially neglecting other relevant factors.
The risks associated with alcohol consumption are not limited to physical health. Alcohol use disorder (AUD), also known as alcoholism, is a common medical condition characterized by an impaired ability to stop or control alcohol use despite adverse social, occupational, or health consequences. AUD can range from mild to severe and is influenced by genetic and environmental factors, with hereditability accounting for approximately 60%. Mental health conditions and a history of trauma are also associated with an increased risk of developing AUD.
The symptoms of AUD include craving beverages containing alcohol, experiencing alcohol withdrawal symptoms such as trouble sleeping, shakiness, restlessness, nausea, sweating, and dysphoria, and planning one's life around the next drink. Treatment for AUD typically involves behavioural therapy, mutual-support groups, and/or medications, with evidence showing that most individuals are able to reduce their alcohol consumption or achieve abstinence.
While there is no guaranteed safe amount of alcohol consumption, general guidelines recommend that adults limit their intake to one drink or less for women and two drinks or less for men on any single day. However, it is important to note that drinking within these limits does not eliminate health risks, and the overall recommendation is that the less alcohol consumed, the better.
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Frequently asked questions
No, according to the World Health Organization (WHO), there is no "safe" level of alcohol consumption that does not affect health. Even low levels of alcohol consumption have been associated with greater risks for hypertension, arrythmias, and cancers of the mouth, throat, and breast.
According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), drinking more than 1 drink per day for women and 2 drinks per day for men is considered excessive.
Drinking alcohol can increase the risk of certain cancers, including breast, colorectal, liver, esophageal, and throat cancer. It can also increase the risk of heart disease, hypertension, arrythmias, and other chronic diseases.
Pregnant women or those planning to become pregnant should avoid drinking alcohol altogether. Alcohol can increase the risk of congenital disabilities and other complications during pregnancy.
