Hydration status plays a crucial role in cognitive function. Adequate water intake is essential for maintaining brain performance since dehydration can impair attention, memory, and overall mental clarity. Studies show even mild dehydration can lead to fatigue, mood swings, and difficulty concentrating. The brain is composed mostly of water, so staying hydrated supports neural activity and helps in managing stress and anxiety levels. Therefore, maintaining proper hydration is vital for optimal cognitive performance and overall mental health.