For many years, we were told that we should drink 8-10 glasses of water each day for our health. But there is no scientific evidence that we need a certain amount of water each day. How much water we take in depends upon the circumstances. If it's a hot day and you're exercising outside and sweating, you need more water. It also depends upon our food intake; many foods such as fruits and other beverages such as milk, tea, and juice contain water.

Let thirst be your guide. And if you are starting to develop other symptoms such as a headache or a dry mouth, you may need to drink more water.

For those who are in the 8-10 glasses a day water habit, don't worry—it won't hurt you. Water helps to fill us up, making it less likely that we'll down as much bread at dinnertime.