You may wonder at what point your drinking becomes harmful to your health, and how much is too much.
This article explores alcohol's effects on your health and reviews intake limits and recommendations.
Alcohol Intake Recommendations
Standard drink size and alcohol intake recommendations differ between countries.
In the United States, a standard drink contains approximately 14 grams of pure alcohol, which is the amount typically found in 12 ounces (355 ml) of regular beer, 5 ounces (150 ml) of wine, or 1.5 ounces (45 ml) of spirit (1).
According to the Dietary Guidelines for Americans, U.S. Department of Agriculture, and U.S. Department of Health and Human Services, moderate drinking involves up to one drink per day for women and up to two drinks per day for men (1, 2 Trusted Source).
Research suggests that only about 2% of those who drink within these limits have an alcohol use disorder (3).
Problematic drinking can relate to binge drinking, heavy drinking, alcoholism, or alcohol dependence.
The Substance Abuse and Mental Health Services Administration (SAMHSA) defines binge drinking as four or more drinks for women or five or more drinks for men on the same occasion, meaning at the same time or within a couple of hours (1).
Heavy drinking or heavy alcohol use is defined as binge drinking on five or more days of the past month (1).
Alcoholism is when you have impaired control over alcohol, are preoccupied with its use, and continue to use it despite adverse consequences (4 Trusted Source).
Moderate alcohol consumption is one drink per day for women and two drinks per day for men. Alcohol use disorders include binge drinking, heavy drinking, and alcoholism.
The Effects of Alcohol on Your Body
Excessive drinking affects your health and almost every part of your body. It can not only damage vital organs but also affect your mood and behavior.
Consuming too much alcohol can have devastating effects on your central nervous system.
Several factors affect how and to what extent it impacts your brain, including how much and how often you drink, the age you started drinking, your gender, and more (5 Trusted Source).
The initial effects of alcohol on your central nervous system include slurred speech, memory impairment, and compromised hand-eye coordination.
Many studies have associated heavy chronic alcohol use with memory deficits (6 Trusted Source).
Alcohol dependence is a major risk factor for developing Alzheimer's disease, especially in women (6 Trusted Source).
Furthermore, it's estimated that alcohol-related brain damage may account for 10% of early-onset dementia cases (7 Trusted Source).
Although brain damage appears to be partially reversible after a longer period of sobriety, chronic and excessive drinking can permanently impair your brain (8 Trusted Source).
Liver damage is another consequence of chronic binge drinking.
Most of the alcohol you drink is metabolized in your liver. This produces potentially harmful byproducts that can damage your liver cells. As you continue drinking over time, your liver health declines.
Alcoholic fatty liver disease is the earliest stage of alcohol-induced liver damage. This condition can occur over time when too much alcohol leads to a buildup of fat in your body's liver cells, which can hinder liver function (9 Trusted Source).
The effects of alcohol can be mentally and physically addicting.
Feeling a compulsive urge to drink, worrying about where or when you'll have your next drink, and finding it hard to enjoy yourself without drinking are all common signs of alcohol dependence (13 Trusted Source).
The cause of this dependence can be complex. It may be caused in part by your genes and family history, but your environment can play a large role as well (14 Trusted Source).
There are many other side effects of chronic alcohol use. While health effects vary between individuals, drinking is often linked to depression and anxiety.
Some people may use alcohol as a quick fix to improve their mood and reduce anxiety, but this typically only provides short-term relief. In the long term, it can end up worsening your overall mental state and health (15 Trusted Source).
Drinking may also affect your weight and body composition.
While drinking in moderation is safe for most individuals, excessive alcohol intake and abuse can have detrimental effects on your physical and mental health.
Gender and Genetics Affect Alcohol Metabolism
Your gender and genetics can affect the rate at which your body metabolizes alcohol.
The primary enzymes involved in alcohol metabolism are alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) (18 Trusted Source).
Women often have lower ADH activity than men. Therefore, women may metabolize alcohol at a slower rate, making them more vulnerable to its effects. That said, some men have low ADH activity as well (19 Trusted Source, 20 Trusted Source, 21 Trusted Source).
For instance, women's bodies have more fat and less water than men's bodies, on average. This may result in higher blood alcohol levels in women, even if they drink the same amount as men (24 Trusted Source).
Gender, genetics, and body composition affect alcohol metabolism. Women may be more vulnerable to its effects than men.
Certain People Should Abstain From Alcohol
For most people, having an occasional alcoholic beverage typically doesn't cause harm. However, in certain situations and among specific populations, alcohol should be avoided.
Pregnancy and Breastfeeding
Research has shown that there is no safe level of alcohol use during pregnancy (25 Trusted Source).
Many studies have concluded that alcohol use during pregnancy increases the risk of miscarriage, birth defects, and cognitive and developmental problems (26 Trusted Source, 27 Trusted Source, 28 Trusted Source).
One study found that birth defects are four times more likely if the mother has been drinking heavily in the first trimester (29 Trusted Source).
According to the Centers for Disease Control and Prevention (CDC), alcohol use during pregnancy is the leading cause of preventable birth defects, developmental disabilities, and mental retardation in the United States (30 Trusted Source).
It's important to note that alcohol can also pass into breast milk if consumed by the nursing mother (31 Trusted Source).
Breastfeeding mothers should wait for the complete elimination of alcohol from breast milk after drinking. This takes about 2–2.5 hours per drink, depending on your body size (32 Trusted Source, 33 Trusted Source).
Additional reasons to abstain from alcohol include:
- Medical conditions. Alcohol may worsen preexisting health conditions like liver disease, diabetes, and kidney disease (9 Trusted Source, 34 Trusted Source, 35 Trusted Source).
- Medications. Alcohol can interact with over-the-counter herbal and prescription medications, including antidepressants, antibiotics, and opioids (36 Trusted Source).
- Underage drinking. Underage drinking, especially heavy and frequent intake, has been associated with immediate and chronic consequences (37 Trusted Source).
- Current and recovering alcoholics. Recovering from an alcohol use disorder can be difficult. Recovering alcoholics should stop drinking completely and avoid their triggers for abuse (38 Trusted Source).
Alcohol use during pregnancy increases the risk of birth defects. It's recommended to abstain from drinking if you have certain preexisting medical conditions, are underage, or take certain medications.
The Bottom Line
While drinking in moderation is safe for most individuals, heavy and chronic alcohol use can have devastating consequences for your mental and physical health.
Many factors play a role in alcohol metabolism, and the effects of alcohol vary by individual, making it tricky to set intake recommendations.
American Dietary Guidelines recommend limiting your alcohol intake to one drink per day for women and two drinks per day for men.
However, some people, such as those with certain medical conditions and pregnant women, should avoid alcohol completely.
Reposted with permission from our media associate Healthline.
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