Question 1

How much water should I drink per day?

Accepted Answer

35ml per kg of body weight is the general guideline. A 70 kg adult needs ~2.45 liters/day. Exercise, heat, and pregnancy increase this significantly.

Question 2

Does coffee count toward water intake?

Accepted Answer

Yes, caffeinated drinks contribute to hydration. Roughly 80% of their volume counts. Excessive caffeine (>400mg/day) has a mild diuretic effect.

Question 3

What are signs of dehydration?

Accepted Answer

Dark yellow urine, dry mouth, fatigue, headache, dizziness, and decreased urine output. Thirst is already a late indicator.

Question 4

Does exercise increase water needs?

Accepted Answer

Yes. You lose ~0.5–1 liter of sweat per hour of exercise. Drink 500ml before, 200ml every 20 minutes during, and replenish losses after.

Question 5

Can you drink too much water?

Accepted Answer

Yes. Hyponatremia (water intoxication) occurs when excess water dilutes sodium. Healthy kidneys can process up to ~1 liter per hour.

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