A new study has found that intermittent fasting of less than 24 hours does not appear to affect mental performance in most adults. Researchers say the human body has adapted to fasting intervals by burning fat as an energy source, and short-term fasting can even improve insulin sensitivity and reduce inflammation. While children and adolescents showed some erosion of mental capabilities while fasting, experts say the benefits of intermittent fasting are reassuring for many people. However, more research is needed to fully understand its effects on different populations and situations.
Source: https://www.healthline.com/health-news/does-intermittent-fasting-affect-cognitive-function