Theo Nash
Alcohol consumption is linked to a wide range of diseases and health conditions, and drinking excessively is a leading preventable cause of death. Heavy drinking is defined as consuming more than two drinks per day for men and more than one drink per day for women. It is associated with an increased risk of cancer, including breast cancer, esophageal cancer, and liver cancer. Heavy alcohol consumption can also lead to liver disease, pancreatitis, and heart disease, as well as mental health issues such as depression and anxiety. It can cause alcohol poisoning, cerebellar degeneration, and cirrhosis of the liver. Additionally, it can negatively impact the immune system, increasing the risk of infections and diseases such as pneumonia. Heavy drinking can also alter brain development, contributing to cognitive deficits and dementia. Alcohol use disorder (AUD) is a condition where individuals continue to consume alcohol despite adverse health consequences, and it is important to acknowledge and address alcohol dependency to reduce these health risks.
| Characteristics | Values |
|---|---|
| Definition of heavy drinking | For men: 5 or more drinks in one day or 15 or more drinks in a week. For women: 4 or more drinks in one day or 8 or more drinks in a week. |
| Diseases linked to heavy drinking | Liver disease, pancreatitis, heart disease, high blood pressure, stomach cancer, breast cancer, esophageal cancer, ovarian cancer, pancreatic cancer, endometrial cancer, diabetes, alcohol poisoning, cerebellar degeneration, cirrhosis of the liver, delirium tremens, alcohol-induced hepatitis, alcohol psychosis, Wernicke-Korsakoff syndrome, and more. |
| Risk factors | Genetic factors, gender, body mass, and general state of health. |
| Treatment | Support groups, professional services, and abstinence. |
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Liver disease
Alcoholic liver disease (ALD) is caused by heavy alcohol consumption. The liver's job is to break down alcohol, and when someone drinks more than it can process, it can become damaged. This damage can lead to steatosis (fatty liver disease), which is the build-up of fat inside liver cells, causing an enlarged liver. Steatosis rarely causes any symptoms but is a warning sign that a person is drinking at a harmful level. This stage of ALD is reversible, and if someone stops drinking for a prolonged period, their liver should return to normal.
The next stage of ALD is hepatitis, an acute inflammation of the liver. This stage can be caused by alcohol misuse over a long period, or by binge drinking. Mild alcoholic hepatitis is usually reversible if someone stops drinking permanently, but severe hepatitis is a serious and life-threatening illness.
The third stage of ALD is cirrhosis, where normal liver tissue is destroyed and replaced by scar tissue. At this stage, the liver may stop functioning correctly. Cirrhosis is generally not reversible, but stopping drinking alcohol immediately can prevent further damage and increase life expectancy.
The final stage of ALD is end-stage liver disease, where a liver transplant is required. Liver transplantation for ALD is only considered in people who have completely abstained from alcohol for at least six months.
The effects of alcohol on the liver depend on the amount consumed and the duration of drinking. ALD is preventable, but many people die from the condition each year. It is often diagnosed during tests for other conditions or when the liver is already severely damaged. Symptoms tend to be worse after a period of heavy drinking.
If you regularly drink alcohol to excess, it is important to seek advice from a healthcare professional to check if your liver has been damaged.
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Cancer
Alcohol consumption is strongly linked to an increased risk of developing cancer. Alcohol is a known carcinogen, and drinking it can increase the risk of various cancers, including those of the oral cavity, pharynx, larynx, oesophagus, liver, colon, and rectum. Even light drinkers are at an increased risk of certain cancers, such as breast cancer in women. The risk of developing cancer increases with the amount of alcohol consumed, with heavy drinkers and binge drinkers at a significantly higher risk.
Alcohol is classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC) due to sufficient evidence linking it to several cancers. The National Toxicology Program has also listed alcoholic beverage consumption as a known human carcinogen in its Report on Carcinogens since 2000. The link between alcohol consumption and cancer risk is well-established, with alcohol accounting for about 5% of all new cancer diagnoses and 4% to 5.8% of all cancer deaths in the United States.
The mechanisms by which alcohol contributes to cancer development include its effect on DNA damage and cell repair, hormonal effects, and reduced nutrient absorption. When the body breaks down ethanol, a chemical found in alcoholic beverages, it produces acetaldehyde, a known carcinogen. Acetaldehyde damages DNA and inhibits cells from repairing this damage, allowing cancerous cells to grow. Alcohol can also affect hormone levels, such as increasing estrogen levels in the body, which can promote the growth and development of certain cancers, such as breast cancer. Additionally, alcohol consumption can interfere with the absorption of essential nutrients, such as folate and vitamins A, B1, B6, C, D, E, K, iron, and selenium, which are important for maintaining cellular health and protecting against cancer.
Heavy alcohol consumption is particularly detrimental, as it can cause inflammation and scarring of the liver, leading to an increased risk of liver cancer. It can also contribute to weight gain, which is a known risk factor for various cancers. Furthermore, alcohol may enhance the effects of other carcinogens, such as tobacco. When combined with smoking, alcohol further increases the risk of developing oral and throat cancers.
It is important to note that the link between alcohol consumption and cancer risk is independent of other factors, and even those who do not smoke or have unhealthy diets are still at an increased risk of cancer if they consume alcohol. As a result, health organizations recommend that individuals who do not drink alcohol should not start drinking, and those who do drink should limit their consumption to lower their risk of alcohol-related cancers.
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Brain damage
Heavy alcohol consumption is linked to several diseases, including liver disease, pancreatitis, and certain types of cancer. One of the most significant impacts of excessive drinking is brain damage, which can have severe and long-lasting consequences.
Alcohol-Related Brain Damage (ARBD)
Alcohol-Related Brain Damage (ARBD) or alcohol-related brain injury (ARBI) is a disorder caused by regular or binge drinking over several years. ARBD typically affects people aged between 40 and 50. It is characterised by damage to both white and grey matter in the brain, leading to cognitive impairments and problems with memory, thinking skills, and reasoning.
Mechanisms of Brain Damage
Alcohol affects the brain in several ways. Firstly, it is toxic to nerve cells, causing neuroinflammation and reducing synaptic complexity. This leads to altered communication between nerve cells and decreased brain volume, particularly in the frontal regions. Alcohol also damages blood vessels in the brain, increasing the risk of stroke and disrupting oxygen supply to the brain. Additionally, heavy drinking can prevent the body from absorbing enough thiamine (vitamin B1), which is essential for proper brain function.
Symptoms and Severity
The symptoms of ARBD vary from mild cognitive impairment, such as small changes in thinking and memory, to more severe problems with memory loss and thinking skills. In some cases, ARBD can lead to Wernicke-Korsakoff syndrome, marked by amnesia, extreme confusion, and eyesight issues. This syndrome is caused by a thiamine deficiency due to alcohol abuse.
Recovery
ARBD does not always progress irreversibly, and recovery is possible with abstinence and proper support. Partial or even full recovery of memory, thinking skills, and independence may be achieved. Within a year of stopping drinking, most cognitive damage can be reversed or improved. However, it is important to note that the extent of recovery depends on various factors, including overall health, liver function, and the duration and severity of alcohol abuse.
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High blood pressure
Heavy drinking is linked to a range of health issues, with high blood pressure being one of the most prominent. Blood pressure refers to the force exerted by circulating blood against the walls of blood vessels. When this pressure is consistently too high, it results in hypertension, which is a common condition that can lead to other health complications.
Alcohol consumption, even at low levels, is associated with increased blood pressure. Heavy drinking, in particular, has been shown to cause hypertension and contribute to other cardiovascular issues such as left ventricular dysfunction and dilated cardiomyopathy. The link between alcohol intake and blood pressure is well-established, with several systematic reviews concluding that alcohol has a considerable impact on blood pressure levels and the risk of hypertension.
The American Heart Association recommends limiting alcohol intake to manage high blood pressure. For those who choose to drink, it is suggested that men should have no more than two drinks per day, while women should have no more than one drink per day. These guidelines are in place to help maintain moderation and reduce the risk of associated health issues.
The effects of alcohol on blood pressure are complex and can vary depending on the amount consumed and the time elapsed since consumption. High-dose alcohol has a biphasic effect, decreasing blood pressure up to 12 hours after consumption and increasing it beyond that point. Additionally, alcohol can affect heart rate, increasing it for up to 24 hours after consumption. These physiological changes can have significant implications for overall health and well-being.
It is important to note that alcohol consumption can also contribute to other health issues, including diabetes, liver disease, digestive problems, and an increased risk of certain cancers. Therefore, it is advisable to drink in moderation or abstain from alcohol altogether to maintain optimal health and minimise the risk of alcohol-related complications.
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Mental health issues
Alcohol problems and mental ill health are closely linked. Research shows that people who drink alcohol are more likely to develop mental health problems. It is also true that people with severe mental illness are more likely to have alcohol problems. This may be because they self-medicate, meaning they drink to deal with difficult feelings or symptoms.
Regular heavy drinking is linked to symptoms of depression. Other mental health issues that may co-occur with alcohol use disorder (AUD) include anxiety, post-traumatic stress disorder (PTSD), and attention-deficit/hyperactivity disorder (ADHD). People with depression who drink alcohol often start to feel better within the first few weeks of stopping drinking. If your symptoms of depression continue, speak to your doctor for help. It is generally not recommended to drink if you're taking antidepressants.
Because alcohol can make you lose your inhibitions and act more impulsively, it may lead to actions such as self-harm or suicide. Heavy drinking is also linked to suicidal thoughts and attempts. The potential for suicidality is a concern not only for those with mood and other mental health disorders but also for many people who drink heavily, whether or not they have AUD. Among those with AUD, about 15 to 30% overall have co-occurring PTSD, with increased rates of 50 to 60% among military personnel and veterans. The two conditions may worsen each other.
If you have a severe mental health problem and a drinking problem, you may be given a "dual diagnosis". If so, mental health services should be in charge of your treatment, rather than drug and alcohol services. If you are physically dependent on alcohol and need to stop drinking completely, stopping suddenly could be harmful. Your doctor can give you advice and/or medication to help you do this safely.
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Frequently asked questions
Heavy drinking is defined as five or more drinks in one day or 15 or more drinks in a week for men. For women, heavy drinking is classified as four or more drinks a day or eight drinks a week.
Heavy alcohol consumption is linked to a variety of diseases, including liver disease, pancreatitis, and cancer.
Excessive alcohol use has been linked to an increased risk of breast cancer in women and esophageal cancer. Studies have also found associations between heavy drinking and pancreatic, ovarian, and stomach cancer.
Heavy drinking can lead to alcohol poisoning, which affects breathing and heart rate. It also increases the risk of accidents, injuries, and violence.
Heavy alcohol consumption can lead to alcohol psychosis, which includes symptoms similar to schizophrenia. It can also contribute to or exacerbate mental health issues such as depression and anxiety.
