Alcohol consumption has long been known to have a variety of adverse effects on the body and mind, including lowered IQ. While any amount of alcohol can have a negative impact on IQ, the degree to which it affects IQ is largely dependent on the amount and duration of alcohol consumption.
In general, studies have shown that heavy, long-term alcohol use can lead to cognitive declines in certain areas, including IQ. Long-term heavy drinking has been associated with a decrease in IQ of up to 7-10 points. This decrease in IQ may be due to the effects of alcohol on the brain, such as changes in brain chemistry and structure, as well as the development of mental health issues, such as depression and anxiety. In addition, long-term drinking can lead to vitamin and nutrient deficiencies, which can further contribute to cognitive impairments.
Moreover, research has shown that even moderate alcohol consumption can have a negative impact on IQ in the short-term. Studies have found that even a single night of heavy drinking can lead to a short-term decrease in IQ of up to 4 points. This decrease in IQ is likely due to the direct effects of alcohol on the brain, as well as the lessened ability to concentrate and focus that can come with intoxication.
Overall, it is clear that alcohol consumption, even in moderate amounts, can have a negative impact on IQ. While the extent of the impact is largely dependent on the amount and duration of alcohol consumption, studies have shown that both short-term and long-term drinking can lead to a decrease in IQ.