What are some gastrointestinal effects of alcohol consumption?

Gastritis and vomiting are recognized gastrointestinal effects of alcohol consumption due to the way alcohol irritates the stomach lining. When alcohol is consumed, it can lead to inflammation of the stomach lining, known as gastritis. This condition can cause symptoms such as stomach pain, nausea, and vomiting. The irritative effects of alcohol can disrupt normal digestive processes and provoke reactions that result in these adverse symptoms.

In contrast, the other options do not accurately reflect the consequences of alcohol on the gastrointestinal system. Increased appetite and weight gain may occur for some individuals due to the high caloric content of alcoholic beverages, but this is not a direct gastrointestinal effect. Improved digestion and nutrient absorption are generally not associated with alcohol, which can actually impair these functions. Lastly, there is no evidence to support that alcohol consumption reduces the risk of liver diseases; rather, chronic alcohol use is a known risk factor for various liver conditions, including fatty liver and cirrhosis.