Your Brain & Dehydration
Did you know?
Your brain is approximately 75% water, which is why even mild dehydration causes headaches.
Use the formula below to work out how much water you should be drinking each day:
Your daily intake of water (litres) = Body weight (kg) × 0.03
This is your minimum daily water intake. You should increase the amount you drink on hot days or if you are exercising.
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