How Does Alcohol Affect Your Nutrition?

The Research Is Conflicting

Friends toasting with beer in a restaurant

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Does alcohol consumption help drinkers lose weight, or does it promote weight gain? Is a little alcohol with a meal good for you or is it dangerous? There seems to be conflicting data available about the nutritional effects of alcohol.

The reality is that the overall health effects of alcohol can vary from one individual to the next. The amount of alcohol that is consumed can also play a critical role.

What Is Alcohol?

Alcohol is a substance produced through the fermentation and distillation of natural sugars and starches. It is one of the most popular psychoactive substances in the world. It can affect both your mental state and mood. It influences consciousness, impairs judgment, and lowers inhibitions.

Nutritional Effects of Alcohol

Alcohol use may also have a number of other health effects. Some of these include:

Weight Changes

The question of drinking a small amount of alcohol along with a meal is not an option for people with an alcohol use disorder. Alcoholics do not stop at just one or two drinks. One or two are never "enough."

But for those who can drink moderately some clinical research indicates that replacing dietary carbohydrates with alcohol causes body weight loss, and adding a moderate amount of alcohol to an adequate diet causes little weight gain.

Such studies indicate that light to moderate drinkers weigh the same or less than those who abstain. But this seems to be contradicted by other research of those who have a few drinks along with meals.


Individuals tend to overeat when they sit down to a high-fat meal and wash it down with alcoholic drinks, according to research results from two studies published in The American Journal of Clinical Nutrition.

"The energy content of alcohol represents extra calories," said Angelo Tremblay, PhD, Professor of Nutrition and Physiology, Laval University, Quebec, Canada, "thus increasing total daily intake. This effect seems to add to the overfeeding associated with a high-fat diet, increasing the chances of weight gain."

The use of alcohol by participants in the studies encouraged the consumption of protein, but not carbohydrates, suggesting that alcohol may modify preference for some types of nutrients. Daily food intake was significantly greater for the heavier drinkers.


When large amounts of alcohol are consumed, the body senses that its caloric needs have been met. This produces a decreased demand for other foods. Alcohol contains about 7 calories per gram. However, these calories do not provide any of the carbohydrates, protein, fat, vitamins or minerals needed to maintain body functions.

Alcohol's toxic effect on the gastrointestinal tract also promotes poor nutrition. Alcohol irritates the gut wall, leading to inflammation and ulceration. This can result in poor absorption of nutrients and a maldigestive gastrointestinal tract.

Alcohol contributes to malnutrition by replacing foods needed for essential nutrients and by interfering with absorption, storage or metabolism of the essential nutrients. There are many other health dangers associated with chronic or long-term drinking.

Heart Problems

High blood triglycerides, along with other risk factors, may increase the chance of developing heart disease. For those who drink alcohol, the liver produces more triglycerides that circulate in the blood.

Brain Disorders

Alcohol can damage the brain in many ways. The most serious effect is Korsakoff's syndrome, characterized in part by an inability to remember recent events or to learn new information. This is often caused by a specific nutritional deficiency of thiamine (Vitamin B1) that can accompany severe alcohol use disorders. For those who have diabetes, alcohol increases the risk of low blood sugar/hypoglycemic reactions.


Studies also have noted an association between alcohol consumption and an increased risk of breast cancer. The mechanism of this effect is not yet known, but the association may be due to carcinogenic actions of alcohol or its metabolites to alcohol-induced changes in levels of hormones, such as estrogens, or to some other process.

Moderate Alcohol Use May Lower Diabetes Risk

Research also suggests that moderate alcohol consumption may actually reduce symptoms of type 2 diabetes. Research suggests that alcohol reduces insulin resistance, which prevents increases in both fasting glucose levels (the amount of sugar in your blood between meals) as well as blood sugar levels following meals.

However, while moderate alcohol use appears to lower your diabetes risk, this risk increases when people engage in heavy or binge drinking.

Alcohol Is Easily Abused

Unfortunately, alcoholic beverages are "foods" with great potential for abuse. They trigger cravings and compulsive eating and drinking as other foods do, but the health and social consequences are more drastic. The compulsive use and abuse of alcoholic beverages can be devastating to individuals and society.

There are many adverse health effects associated with heavy drinking or binge drinking. The damage is done by the toxic effects of alcohol, by nutrient deficiencies and by other adverse effects of the wrong food such as food allergy.

Heavy drinkers tend to "starve"—they eat little or have limited, inferior food choices. They have used up their nutrient stores and electrolyte depletion and vitamin and mineral deficiencies are just some of the negative health effects.

A Word From Verywell

Alcohol is high in empty calories, so cutting back on beverages including beer, wine, and cocktails may help reduce your overall calorie intake. An occasional drink or two is fine, but heavy drinking comes with numerous health risks. Limiting your alcohol intake to a light or moderate amount may help lower your risk for certain health conditions linked to heavy alcohol use, including heart problems, diabetes, and cancer.

7 Sources
Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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