human
I've heard that drinking coffee can help me stay alert during the day. Is this true?
assistant
It's certainly possible, but it's hard to say exactly how much of an effect caffeine has on your alertness. Some research suggests that caffeine may improve performance in tasks involving attention and vigilance, such as driving or playing video games. However, other studies have found no effect of caffeine on cognitive functioning. Ultimately, the effects of caffeine depend on individual factors like genetics, body weight, age, diet, and overall health.