Chronic, heavy drinking raises the risk for ischemic heart disease (heart problems caused by narrowed arteries) and myocardial infarction (heart attack). Scientific evidence about drinking alcohol goes back nearly 100 years—and includes plenty of variability in alcohol’s health effects. As an example, a highly cited study of one million women in the United Kingdom found that moderate alcohol consumption—calculated as no more than one drink a day for a woman—increased overall cancer rates. We need more high-quality evidence to assess the health impacts of moderate alcohol consumption. Our work, and that of others, has shown that even modest alcohol consumption likely raises the risk for certain diseases, such as breast and esophageal cancer. “But when you consider how alcohol is metabolized and used by your body, we can start to see that even moderate and social drinking affects our health to some degree.”
Alcohol may also speed HIV progression in people living with the disease, influence their engagement and retention in HIV treatment, and increase their susceptibility to organ damage and coinfections. Alcohol misuse can also lead to high blood pressure, an irregular heartbeat (arrhythmia), or increased heart rate. There is also evidence that alcohol can disrupt or delay puberty. For example, alcohol misuse is linked to peripheral neuropathy, a condition that commonly occurs in people with severe alcohol use disorder (AUD) and can cause numbness in the arms and legs and painful burning in the feet. In addition to its effects on the brain, alcohol also affects the peripheral nervous system, which comprises the nerves outside the brain and spinal cord.
Public Health
Large, long-term, gold-standard studies are expensive. Again, that evidence is persuasive in combination. In observational trials, it also appears to lower the risk of diabetes. When the data from both types of studies point in the same direction, we can have more confidence in the conclusion.
But observational studies cannot prove cause-and-effect because moderate drinkers differ in many ways from non-drinkers and heavy drinkers—in diet, exercise, and smoking habits, for instance. Moderate alcohol consumption has been studied in dozens of randomized controlled trials, but those trials have never tracked more than about 200 people for more than two years. That doesn’t mean drinking a lot of alcohol is good for you—but it does suggest that the science around alcohol and health is complex. It’s important to keep in mind that alcohol affects many body systems—not just the liver and the brain, as many people imagine.
That usually means four or more drinks within two hours for women and five or more drinks within two hours for men. It means on days when a person does drink, women do not have more than one drink and men do not have more than two drinks. Here’s a closer look at alcohol and health. For more information about alcohol and cancer, please visit the National Cancer Institute’s webpage «Alcohol and Cancer Risk» (last accessed June 6, 2024). Chronic pancreatitis is a risk factor for the development of pancreatic cancer and diabetes.
Mental health
Alcohol-related damage to nerves may also cause heart arrythmias (irregular heartbeat), postural or orthostatic hypotension (a drop in blood pressure due to a change in body position), diarrhea, and erectile dysfunction. The whole body is affected by alcohol use–not just the liver, but also the brain, gut, pancreas, lungs, cardiovascular system, immune system, and more. Excessive alcohol use can harm people who drink and those around them. More information about alcohol and cancer risk is available in the Surgeon General’s advisory.
U.S. Standard Drink Sizes
Both acute and chronic heavy use of alcohol can interfere with multiple aspects of the immune response, the result of which can impair the body’s defense against infection, impede recovery from tissue injury, cause inflammation, and contribute to alcohol-related organ damage. Drinking too much alcohol can weaken the immune system, making the body a much easier target for disease. Heavy alcohol use can cause deficiencies in specific components of the blood, including anemia (low red blood cell levels), leukopenia (low white blood cell levels), thrombocytopenia (low platelet levels), and macrocytosis (enlarged red blood cells). Heavy alcohol use can disturb the endocrine system, disrupting the hormones that help maintain the body’s stability and health.
Excessive alcohol use
Some desert insects, such as Onymacris unguicularis, have evolved to drink substantially from nighttime fog. An exception is the common pigeon, which can suck in water directly by inhalation. Cats drink at a significantly slower pace than ruminants, who face greater natural predation hazards. Ruminants and most other herbivores partially submerge the tip of the mouth in order to draw in water by means of a plunging action with the tongue held straight. Canines lap water by scooping it into their mouth with a tongue which has taken the shape of a ladle. Cats, canines, and ruminants all lower the neck and lap in water with their powerful tongues.
When a liquid enters a human mouth, the swallowing process is completed by peristalsis which delivers the liquid through the esophagus to the stomach; much of the activity is assisted by gravity. In the meantime, we must acknowledge the complexity of existing evidence—and take care not to reduce it to a single, misleading conclusion. Now the pendulum has swung so far in the opposite direction that contemporary narratives suggest every ounce of alcohol is dangerous.
Defining moderate alcohol use
Patients should work with their clinicians to understand their personal risks and make informed decisions about drinking. Together, that evidence is highly persuasive that alcohol increases the chances of breast cancer. To get a clearer picture of the health effects of alcohol, researchers and journalists must be far more attuned to the nuances of this highly complex issue. Longer and larger experimental trials have been used to test full diets, like the Mediterranean diet, and are routinely conducted to test new pharmaceuticals (or new uses for existing medications), but they’ve never been done to analyze alcohol consumption.
Yet we continue to see reductive narratives, in the media and even in science journals, that alcohol in any amount is dangerous. It’s hard to escape the message these days that every sip of wine, every swig of beer is bad for your health. This story was previously published in Harvard Public Health magazine, which featured independent journalism about public health challenges and solutions outside Harvard Chan School. Your gift powers excellence in research and education to advance public health. Alcohol (in any amount) is a well-known cause of cancer
Mayo Clinic Press
- Earlier this month, for instance, the media reported on a new study that found even small amounts of alcohol might be harmful.
- We talked with hepatologist Shreya Sengupta, MD, about how alcohol use affects your body and your emotional health.
- Steatotic liver disease used to go by the name fatty liver disease.
- Alcohol misuse can also lead to high blood pressure, an irregular heartbeat (arrhythmia), or increased heart rate.
- People who are dependent on alcohol, or have other medical or mental health problems, should stop drinking completely.
- In addition, specialized nectar feeders like sunbirds (Nectariniidae) and hummingbirds (Trochilidae) drinkby using protrusible grooved or trough-like tongues, and parrots (Psittacidae) lap up water.
Meanwhile, some authors of studies suggesting alcohol is unhealthy have received money from anti-alcohol organizations. We have been researching the health effects of alcohol for a combined 60 years. If you have concerns about your drinking, talk with your health care provider. “If drinking is affecting your health, your relationships, your work, your finances, it’s time to make some serious changes.” “Excessive alcohol consumption can cause nerve damage and irreversible forms of dementia,” Dr. Sengupta warns. But no research proves that red wine causes any improvements in heart health in people.
You probably already know that excessive drinking can affect drinking because of boredom you in more ways than one. During pregnancy, drinking may cause the unborn baby to have brain damage and other problems. Heavy drinking also has been linked to intentional injuries, such as suicide, as well as accidental injury and death.
A high rate of consumption can also lead to cirrhosis, gastritis, gout, pancreatitis, hypertension, various forms of cancer, and numerous other illnesses. Most cultures throughout history have incorporated some number of the wide variety of «strong drinks» into their meals, celebrations, ceremonies, toasts and other occasions. Drinking beyond thirst might be beneficial for people who need to perform tasks that require intense concentration, and those with kidney disease, kidney stones, urinary tract infections, and people with a weak sense of thirst (which may include more older people). Research shows drinking when thirsty will maintain hydration to within about 2% of the needed level.
For men, heavy drinking means more than four drinks on any day or more than 14 drinks a week. For women, more than three drinks on any day or more than seven drinks a week is heavy drinking. But good evidence shows that drinking high amounts of alcohol are clearly linked to health problems. Research has demonstrated that long-term heavy drinking weakens the heart muscle, causing cardiomyopathy. Because these disturbances permeate every organ and tissue in the body, they can contribute to endocrine-related health conditions including thyroid diseases, dyslipidemia (abnormal cholesterol levels in the blood), reproductive dysfunction, and stress intolerance, and diabetes.
Putting it in context: standard alcohol drink sizes
Yes, grabbing a few beers or a couple of glasses of wine or cocktails with friends can increase your heart rate — dangerously in some cases ACV may help lower blood sugar and calm acid reflux, but don’t believe all the hype An enzyme deficiency or rosacea are potential causes of alcohol flush “Alcohol tends to cause more problems than it solves for a lot of people,” Dr. Sengupta emphasizes.
- As an example, a highly cited study of one million women in the United Kingdom found that moderate alcohol consumption—calculated as no more than one drink a day for a woman—increased overall cancer rates.
- Current research points to health risks even at low amounts of alcohol consumption, regardless of beverage type.
- In the United States, people younger than age 21 are not legally able to drink alcohol.
- An enzyme deficiency or rosacea are potential causes of alcohol flush
- While the risk is low for moderate intake, the risk goes up as the amount you drink goes up.
- But prolonged alcohol abuse can lead to chronic (long-term) pancreatitis, which can be severe.
Alcohol consumption has developed into a variety of well-established drinking cultures around the world. Evidence of fermented drinks in human culture goes back as early as the Neolithic Period, and the first pictorial evidence can be found in Egypt around 4,000 BC. An overconsumption of water can lead to water intoxication, which can dangerously dilute the concentration of salts in the body. One recognizes the order by the single behavioral characteristic, namely that in drinking the water is pumped up by peristalsis of the esophagus which occurs without exception within the order. By necessity, terrestrial animals in captivity become accustomed to drinking water, but most free-roaming animals stay hydrated through the fluids and moisture in fresh food, and learn to actively seek foods with high fluid content. In 2018, the National Institutes of Health ended our trial to study the health effects of alcohol.
Many people drink alcohol as a personal preference, during social activities, or as a part of cultural and religious practices. While the risk is low for moderate intake, the risk goes up as the amount you drink goes up. Drinking alcohol is a health risk regardless of the amount. Heavy alcohol use raises the risk for fractures and even low levels of alcohol intake increase the odds for recurrent gout attacks. People who drink often are more liable to contract diseases like pneumonia and tuberculosis than people who do not drink too much.