Occasional alcohol consumption can have both short-term and long-term effects on the body. Short-term effects include impaired judgment, reduced coordination, and increased risk of accidents and injuries. However, the long-term effects of occasional alcohol consumption are less clear and depend on several factors such as the amount and frequency of alcohol consumption, age, gender, genetics, and overall health.

According to the Centers for Disease Control and Prevention (CDC) [2], moderate alcohol consumption, which is defined as up to one drink per day for women and up to two drinks per day for men, may have some health benefits such as reducing the risk of heart disease, stroke, and diabetes. However, the CDC warns that excessive alcohol consumption, even on an occasional basis, can increase the risk of certain cancers, liver disease, and mental health problems such as depression and anxiety.

A study published in the National Library of Medicine [3] found that even low levels of alcohol consumption can have adverse effects on the brain, including decreased cognitive function and increased risk of dementia. The study also suggests that the effects of alcohol on the brain may be more pronounced in women than in men.

It is important to note that alcohol affects each person differently, and the long-term effects of occasional alcohol consumption can vary greatly depending on individual factors. It is always recommended to consult with a healthcare professional before consuming alcohol, especially if you have any underlying health conditions or are taking medication.

Sources:
[2] https://www.cdc.gov/alcohol/fact-sheets/moderate-drinking.htm
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5073014/