You don't need 8 glasses of water per day, you probably need more.
We've all heard you should drink eight glass of water per day. While this is a good start, as many aren't even managing to drink this amount, there's a more accurate amount of water your body needs. It has to do with your physical size and activity level, which makes sense as every body is different and has different water requirements for optimal function. This article goes into a little more depth but in brief, how you determine how much water your body is likely to require is this:
Take your body weight in pounds
Multiply it by 67% (or 2/3)
That is how many ounces of water your body needs. (Adjust this number if you're physically active for 30 min or more. The article goes further into the calculation in that case.)
If you're 135 lbs, 67% of that is 135 x 0.67 = 90.45 oz
90.45 oz divide by 8oz per cup = at least 11 cups of water per day
That's nearly three litres of water
The average adult body is 50-65% water. Interestingly babies are about 75-78% water but have you noticed their amazing skin and how skin wounds heal so much more quickly? Not saying water is the fountain of youth, but we need it to survive and we need ENOUGH of it to physically thrive. Make sure sufficient water intake is part of your healthy diet.
Are you getting enough?