5.You’re Less Likely to Faint
You’re less likely to pass out when you give blood if you’ve had enough water. The same seems to be true if you’re careful to replace water lost through sweat or urine. When levels get a bit low, your blood pressure can drop and your nervous system can’t control it as well. That could make you faint. Watch out for this if it’s hot outside, and especially when you exercise.
6.How Much Is Enough?
A good rule of thumb is 15 cups a day for men and 11 cups for women. But keep in mind that includes total fluids. You get 20% to 30% of your water from food. You get more from other drinks like juice, tea, and milk. If you’re sick, you’ll need more (especially with diarrhea or vomiting). If you’re exercising or outside in the heat, focus on getting a little extra, too.
