Hydration basics

7 Benefits of Drinking Water, Backed by the CDC and Mayo Clinic

By the Fresh Alka Water family · October 16, 2026 · 5 min read

Water makes up more than half of your body weight, and almost everything your body does depends on it. Here is what the research says water does for you, in plain language, with links to the sources so you can read them yourself.

1. It keeps your body temperature steady

When you get hot, you sweat, and sweat cools you as it evaporates. That only works if you replace the water you lose. The CDC lists temperature control as one of the main reasons to drink enough water, and it matters more on hot days and during exercise.

2. It cushions your joints and protects sensitive tissue

Water helps lubricate and cushion your joints, and it protects your spinal cord and other sensitive tissues, according to the CDC.

3. It helps your body get rid of waste

Your body flushes out waste through urine, sweat and bowel movements, and all three need water. Not drinking enough is one of the common causes of constipation, which both the CDC and Mayo Clinic point out.

4. It supports focus, mood and energy

Even mild dehydration can affect how you think and feel. A review of the research published in Nutrition Reviews describes studies, including some in children and older adults, where even mild dehydration affected mood and mental performance. Mayo Clinic notes that water supports brain function, mood and energy.

5. It supports your kidneys

Your kidneys use water to filter waste and make urine. The National Institutes of Health lists drinking enough liquid, mainly water, as one of the most important ways people can lower their chance of kidney stones. Mayo Clinic adds that staying hydrated helps keep urine healthy. If you've had kidney stones, your doctor can tell you how much to drink.

6. It helps with digestion and nutrients

Water helps your body digest food and move nutrients to your cells. Mayo Clinic lists digestion and nutrient absorption among water's core jobs.

7. Swapping sugary drinks for water cuts calories

Water has zero calories. The CDC recommends choosing water over sugary drinks as a simple way to cut calories, and suggests adding a slice of lemon or lime if you want flavor.

Signs you need more water

According to Mayo Clinic, you are probably drinking enough if you rarely feel thirsty and your urine is colorless or light yellow. Headaches, dark urine and feeling sluggish during exercise can be signs you need more.

Easy ways to drink more

• Keep a refillable bottle with you. A 1-gallon jug on the counter makes it easy to see how much you've had.
• Drink a glass with every meal.
• Keep cold water in the fridge so it's the easiest drink to grab.
• If you like the taste, you'll drink more of it. Many of our customers tell us that's why they switched to refilling.

This article is general information, not medical advice. If you have a health condition, ask your doctor how much water is right for you.