About 80% of the human brain is water, making it incredibly hydrated!
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Science
The human brain consists of approximately 80% water, which is vital for its function and development. This high water content plays a crucial role in maintaining electrolyte balance and supporting neural activity. Dehydration can negatively affect brain performance, including concentration and cognitive functions. Given this fact, maintaining proper hydration is essential for optimal brain health.
Source: healthline.com