Скачать или смотреть wow facts #34 Your brain uses 20% of your energy every day 🧠

The human brain is one of the most energy-demanding organs in the body. Despite accounting for only about 2% of total body weight, it consumes roughly 20% of the body’s daily energy. This energy fuels essential processes like thinking, memory, emotion regulation, and sensory perception — even when you’re resting or asleep.

Neurons constantly send electrical and chemical signals, requiring a steady supply of glucose and oxygen. Tasks like decision-making, problem-solving, and emotional processing significantly increase brain activity, which explains why intense mental work can feel exhausting.

This high energy demand highlights how valuable mental effort truly is. Feeling tired after deep thinking isn’t a flaw — it’s a biological signal that your brain is doing meaningful work.

Do you notice mental fatigue more after thinking or physical activity?