What causes dehydration? Dehydration happens when you don't drink enough water, or when you lose water quickly through, for example, sweating, vomiting and/or diarrhea. Certain medications such as diuretics (water pills) can result in increased urination and dehydration.
In general, drinks with a higher alcohol content – think spirits such as vodka, gin, whiskey, and rum – are higher on the spectrum of alcohol content, making them more dehydrating per ounce than alcohols such as beer and wine.
Coffee, tea, soda, and alcohol are drinks that people associate with dehydration. Alcohol is a diuretic, which removes water from the body. Drinks such as coffee and soda are mild diuretics, although they can have dehydrating effects on the body.
While water consumption is a critical part of keeping our bodies healthy, it is possible to over hydrate. “Drinking too much water can actually lead to a condition called water intoxication, in which excess water dilutes out important blood electrolytes such as sodium, potassium, magnesium and calcium,” Anegawa says.
The caffeine in coffee gives it diuretic effects, meaning it causes your body to pass more urine. But these effects are too mild to cause dehydration, especially if you're a regular coffee drinker. Coffee may even be hydrating for some people, because it contains a lot of water.
Tertiary alcohols undergo dehydration very fast.
Milk is more hydrating than water
For example, milk was found to be even more hydrating than plain water because it contains the sugar lactose, some protein and some fat, all of which help to slow the emptying of fluid from the stomach and keep hydration happening over a longer period.
With beginning symptoms of dehydration, you can rehydrate by consuming fluids that contain electrolytes, such as sports drinks or oral rehydration solutions. There are also foods available that have a high water content, such as fruits and vegetables. These will also help with rehydration.
If it's hot out, your uncontrollable body temperature means your vital organs risk overheating; liver failure will probably kill you. But if conditions are mild, toxic sludge builds up in your blood, and your coroner's report will more likely read: kidney failure.
Fruits and vegetables can help with hydration [a banana is 74% water!] and provide healthful nutrients such as vitamins, minerals, fiber and protein. So for elite athletes – or those just trying to stay fit – a diet with plenty of fruits and vegetables, including bananas, is important for performing at your best!
Drink an ORS Before Bed
Instead of drinking a glass of water, drink an oral rehydration solution like DripDrop ORS, which also contains electrolytes that are essential for hydration. Try to drink the ORS an hour or two before bed so you don't wake up in the middle of the night to use the restroom.
Gatorade, because of its electrolyte content, helps to restore the lost electrolytes and keep a person hydrated, during intense activity. It can also replace electrolytes, during times of illness, such as stomach viruses.
Most people assume drinks with caffeine automatically cause dehydration because of their diuretic effect. With that in mind, it's easy to see why so many people wonder if green tea dehydrates them. But here's the good news: according to medical science green tea actually rehydrates you.
You are probably all aware of the “cardinal rule” that says adults should drink six to eight 8-ounce glasses of water per day.