How does alcohol affect the liver?

Alcohol significantly affects the liver, as it is the primary organ responsible for metabolizing alcohol in the body. The liver has a limited capacity to process alcohol, and any amount exceeding this capacity can lead to the accumulation of harmful substances and damage to liver cells over time. Excessive alcohol consumption, whether short-term or long-term, can cause a range of serious liver problems, including alcohol-associated fatty liver disease, alcohol-associated hepatitis, and cirrhosis [1].

How does the liver process alcohol?

When alcohol is consumed, it is absorbed into the bloodstream and travels to the liver where it is metabolized. The liver is responsible for breaking down alcohol, but its capacity to do so is limited. When alcohol is consumed in large quantities, toxic alcohol metabolites can accumulate in the liver, leading to inflammation and damage to liver cells [3]. This process can harm many other organs in the body, not just the liver [6].

Alcohol-associated liver diseases

Long-term excessive alcohol consumption can lead to the development of several serious liver conditions:

• Alcohol-associated fatty liver disease (Steatosis): This fat accumulation in liver cells is the first sign of alcohol-related liver injury and affects approximately 95-100% of heavy drinkers. This condition can be fully reversible if the individual stops drinking alcohol [7].

• Alcohol-associated hepatitis: This occurs when alcohol consumption causes inflammation and damage to liver cells. Symptoms can range from mild to severe and may include jaundice (yellowing of the skin and eyes) and worsening liver function. Alcohol-associated hepatitis can be acute and life-threatening in some cases [7].

• Alcohol-associated cirrhosis: This is the most advanced and dangerous stage of alcohol-related liver disease. Cirrhosis occurs when liver cells are permanently damaged and replaced by scar tissue, hindering normal liver function. In cases of cirrhosis, the patient may require a liver transplant [7]. Stopping alcohol consumption is essential to improve prognosis and prevent further damage, and it significantly increases survival rates compared to those who continue to drink [7].

When should you consider stopping alcohol consumption?

If you drink alcohol regularly, it is important to be aware of the potential risks to the liver. It is advised to stop drinking alcohol completely if you have any medical condition that could be exacerbated by alcohol, if you are taking medications that interact with it, or if you are pregnant or trying to conceive [4]. Even moderate drinking may increase the risk of certain types of cancer and heart disease [1]. If you are having difficulty controlling the amount of alcohol you drink, or if you have tried to cut down and have not succeeded, it is recommended to seek medical advice. A healthcare professional can help you determine whether you should cut down or stop drinking entirely, based on factors such as your medical and family history [5].

Signs that require attention

It is important to pay attention to signs that may indicate liver damage and require medical attention. Although the sources do not specify particular warning signs for liver damage, any deterioration in general health or the appearance of unexplained symptoms after alcohol consumption should prompt you to seek medical advice. Excessive alcohol consumption can lead to many health complications beyond the liver, including problems in the brain, digestive system, heart, and immune system [6]. For more information on the general health risks of alcohol use, you can visit Alcohol and Body Health: Understanding the Health Risks of Alcohol Use (Arabic).

Medical references

• Alcohol
• Alcohol Use and Your Health
• About Moderate Alcohol Use | Alcohol Use | CDC
• Should You Cut Down or Quit? | Rethinking Drinking | NIAAA
• Alcohol's Effects on the Body | National Institute on Alcohol Abuse and Alcoholism (NIAAA)
• Medical Complications: Common Alcohol-Related Concerns | National Institute on Alcohol Abuse and Alcoholism (NIAAA)