Which organ is primarily affected by chronic alcohol use?

Which organ is primarily affected by chronic alcohol use?

• A. Liver
• B. Heart
• C. Brain
• D. Lungs

Answer: (A)

Chronic alcohol exposure causes the most damage to the liver because it is the primary site for ethanol metabolism. When alcohol is processed, acetaldehyde is produced and the ratio of NADH to NAD+ rises, which disrupts normal fat and energy metabolism in liver cells. This promotes fat accumulation (fatty liver) and, with ongoing use, inflammation and scarring as the liver tries to repair the damage. Over time this can progress to alcoholic hepatitis and cirrhosis. While the brain, heart, and lungs can certainly be affected by long-term drinking, the liver bears the greatest and most direct impact due to its central role in breaking down and detoxifying alcohol, plus its vulnerability to metabolic stress from this process.

Chronic alcohol exposure causes the most damage to the liver because it is the primary site for ethanol metabolism. When alcohol is processed, acetaldehyde is produced and the ratio of NADH to NAD+ rises, which disrupts normal fat and energy metabolism in liver cells. This promotes fat accumulation (fatty liver) and, with ongoing use, inflammation and scarring as the liver tries to repair the damage. Over time this can progress to alcoholic hepatitis and cirrhosis. While the brain, heart, and lungs can certainly be affected by long-term drinking, the liver bears the greatest and most direct impact due to its central role in breaking down and detoxifying alcohol, plus its vulnerability to metabolic stress from this process.