Researchers at Liverpool found that hydration dramatically reduces the body’s stress response.
In their study, 32 adults went through a stress test after a week of controlled fluid intake. One group drank little water (1.3L/day) and the other stayed well hydrated (4.4L/day).
Both groups felt equally stressed, but the dehydrated group showed a 55% stronger cortisol surge that lasted 30 minutes or longer.
When your body is dehydrated it releases vasopressin to conserve water. This also triggers cortisol, amplifying stress. Over time, chronic activation raises risks for heart disease, diabetes and depression. And potentially that fat that loves to accumulate around our belly.
In conclusion, hydration is not just about quenching thirst. It is one of the simplest and most overlooked ways to lower stress and protect your long term health.
Wait? What?? That didn’t convince you to drink more water? Well, how about these 8 facts?
8 Science Backed Reasons You Should Drink More Water
1. Water Regulates Body Temperature
One of the most important functions of water in the body is thermoregulation, or the ability to maintain a stable internal temperature.
2. Water Fuels Physical Performance
If you’ve ever felt sluggish during a workout, chances are you weren’t just tired—you might have been dehydrated. Even a loss of 1–2% of body water can impair physical performance. Muscles are about 75% water, and without adequate hydration, they cannot contract efficiently.
3. Water Boosts Brain Function
Your brain may only make up about 2% of your body’s weight, but it consumes around 20% of your energy—and water is central to its function. Brain tissue is about 73% water, and even mild dehydration can affect memory, focus, and mood.
4. Water Removes Waste and Toxins
Your body is like a bustling city, and cells are constantly generating waste products. If these wastes were allowed to build up, they would poison you. Water is the sanitation system that keeps everything clean.
5. Water Supports Healthy Skin
Your skin is the largest organ of your body, and it depends on water for health and vitality. Dehydration causes the skin to lose elasticity, appear dull, and become more prone to fine lines and dryness.
6. Water Helps Maintain a Healthy Weight
Water plays a surprising role in weight management. For starters, it has zero calories, making it the perfect replacement for sugary drinks. Just swapping sodas or juices for water can dramatically reduce daily calorie intake.
But there’s more. Drinking water before meals has been shown to promote satiety, reducing appetite and leading people to eat fewer calories.
In addition, water helps the body burn fat more effectively. When the body breaks down fat for energy, the process—called lipolysis—requires water molecules. Without enough hydration, fat metabolism slows.
7. Water Protects Joints and Tissues
Every movement you make, from bending a knee to turning your head, relies on water. Joints are cushioned by cartilage, a tissue that is about 80% water. When you’re dehydrated, cartilage loses its ability to absorb shock, leading to stiffness and discomfort.
Water also lubricates joints through synovial fluid, a slippery liquid that reduces friction between bones. Without enough water, movement becomes harder and more painful, increasing the risk of injuries and conditions like arthritis.
8. Water Strengthens the Immune System
Your immune system, your body’s defense against infections and diseases, also depends on water. Hydration supports the production of lymph, a fluid that carries immune cells throughout the body, identifying and neutralizing threats.
How Much Water Should I Be Drinking?
The average person really does need to drink 8 – 10 glasses of water a day, which works out to be about 2 to 2.5 litres but if you want to be more exact, try this formula.
FORMULA FOR WATER: (Your Weight in Kilograms) / 8 = how many 250 ml glasses of water you should drink in a day minimum.
And make sure you don’t flood your system with this water all at once. Your best bet is to drink a glass of water immediately upon rising and then keep sipping throughout the day to get the most benefit from all this amazing, health giving water!
But hey, I get it. Not all of us want to have more focus and energy. And sometimes we don’t want to have better skin, energy or joint health. And if that is you, well forget everything I said about drinking enough water and keep doing what you are doing! 😉
