To prevent dehydration, you need to drink adequate amounts of water. There are many different opinions on how much water you should be drinking every day. Health authorities commonly recommend about 2 liters per day.
We’ve all heard that’s best. But the truth is, how much water you need varies, depending on how active you are and what type of climate you live in, among other things. Even if you’re not very active or live in a humid climate, you lose water every day through your breath, sweat, pee, and bowel movements.
About 60% of your body weight is made of water. You need it for every single body function. It flushes toxins from your organs, carries nutrients to your cells, cushions your joints, and helps you digest the food you eat.
If you don’t get enough water, you can become dehydrated. Severe cases of dehydration can cause dizziness, confusion, and even seizures.
If you’re outside on a hot day, or doing something that makes you sweat a lot, you’ll need to drink more fluids to stay hydrated. The same is true if you have an illness that causes you to throw up, have diarrhea, or run a fever.
But if you have a condition like heart failure or a particular type of kidney disease, you may need to limit your fluid intake. Talk to your doctor about what’s right for you.