This article comes across as a bit misleading and exaggerated. It places caffeine consumption as a primary cause of "brain fog" but doesn't use evidence to connect the two. The author explains that caffeine can cause symptoms of sleep deprivation, citing a reliable source in Cleveland Clinic. This sleep deprivation is what can cause the feeling of brain fog, but sleep deprivation isn't just caused by caffeine consumption, and the article never fully bridges the gap between caffeine and brain fog. Obviously, a lack of sleep could be caused by caffeine and lead to brain fog, but the claim of the article makes it sound like consuming caffeine products causes your brain to get foggy, which is not true.