Alcohol consumption increases the production of reactive oxygen species (ROS), which can damage cellular components like lipids, proteins, and DNA, leading to oxidative stress. This stress is a key factor in the development of alcoholic liver disease (ALD). Alcohol promotes ROS generation through various mechanisms, including the breakdown of alcohol into acetaldehyde, stimulation of cytochrome P450 enzymes, and alterations in metal levels. It also reduces antioxidant levels, exacerbating oxidative stress. ROS can cause lipid peroxidation, protein damage, and DNA mutations, contributing to cell injury and liver damage. ROS are produced in the mitochondrial respiratory chain and by enzymes like cytochrome P450 and xanthine oxidase. Metals such as iron and copper can catalyze the formation of hydroxyl radicals, further increasing oxidative stress. Alcohol also affects immune cells, leading to increased cytokine production and inflammation. Antioxidants like glutathione, vitamin E, and vitamin C help neutralize ROS, but alcohol consumption can deplete these antioxidants, worsening oxidative stress. Oxidative stress is a major contributor to ALD and other diseases, including cardiovascular issues, cancer, and neurodegenerative disorders. Research indicates that antioxidants, iron chelators, and other compounds can prevent or reduce alcohol-induced liver injury. Studies using animal models and cultured liver cells show that alcohol metabolism leads to ROS production, cell death, and mitochondrial damage. These findings highlight the importance of understanding oxidative stress mechanisms to develop effective treatments for alcohol-related diseases. Future research should focus on clarifying the role of ROS in various tissues, the impact of environmental factors, and the effects of antioxidants in heavy drinkers.Alcohol consumption increases the production of reactive oxygen species (ROS), which can damage cellular components like lipids, proteins, and DNA, leading to oxidative stress. This stress is a key factor in the development of alcoholic liver disease (ALD). Alcohol promotes ROS generation through various mechanisms, including the breakdown of alcohol into acetaldehyde, stimulation of cytochrome P450 enzymes, and alterations in metal levels. It also reduces antioxidant levels, exacerbating oxidative stress. ROS can cause lipid peroxidation, protein damage, and DNA mutations, contributing to cell injury and liver damage. ROS are produced in the mitochondrial respiratory chain and by enzymes like cytochrome P450 and xanthine oxidase. Metals such as iron and copper can catalyze the formation of hydroxyl radicals, further increasing oxidative stress. Alcohol also affects immune cells, leading to increased cytokine production and inflammation. Antioxidants like glutathione, vitamin E, and vitamin C help neutralize ROS, but alcohol consumption can deplete these antioxidants, worsening oxidative stress. Oxidative stress is a major contributor to ALD and other diseases, including cardiovascular issues, cancer, and neurodegenerative disorders. Research indicates that antioxidants, iron chelators, and other compounds can prevent or reduce alcohol-induced liver injury. Studies using animal models and cultured liver cells show that alcohol metabolism leads to ROS production, cell death, and mitochondrial damage. These findings highlight the importance of understanding oxidative stress mechanisms to develop effective treatments for alcohol-related diseases. Future research should focus on clarifying the role of ROS in various tissues, the impact of environmental factors, and the effects of antioxidants in heavy drinkers.