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1. Pee can be a window to your overall health.

It provides vital information about your kidney and heart health, and your liver function. And the amount of bathroom trips you take can also signal health issues: Infrequent urination could indicate dehydration or even a kidney problem.

2. It's 95% water.

The rest is 2.5% urea and a 2.5% combination of salt, hormones, nutrients, and creatine. Over a lifetime, the kidneys will clean approximately one million gallons of water into pee.

3. Pee that smells isn't always a bad thing.

Sometimes it's just the foods we eat, including asparagus, alcohol, coffee, and garlic. But, if your urine smells like any of the following you should take note:

• A smell of ammonia could indicate dehydration.

• A musty smell might mean liver disease.

• A foul smell could indicate a bladder infection.

• A sweet smell could mean diabetes.

4. Your pee color can change.

Blame that pink- or orange-ish tint on beets or carrots. And brown or red urine is cause for alarm: It can indicate kidney stones or liver damage. Another thing to consider? Certain drugs and foods rich in B vitamins can change the color, too.

5. Pee is sterile.

In the bladder, that is. But as soon as it leaves your body, it can pick up bacteria from the urethra and air.

6. The average adult produces 6.3 cups of urine a day.

The bladder can hold about 2.5 cups of urine at a time for up two to five hours. (That's slightly larger than a pint of beer.) And you'll usually start to feel the urge to pee when your bladder has about a cup full.

In comparison, a Clydesdale horse can urinate more than 72 cups a day — that's 4.5 gallons! And an elephant? A whopping 13 gallons or 208 cups.

7. Peeing on a jellyfish sting won't heal it.

Sorry Friends fans, but this trick doesn't actually work. Instead, simply rinse the burn in hot water and apply a local anesthetic from your drugstore.

8. Pee is good for the skin. Sort of.

A synthetic version of urea (which is a component of urine) is often used in moisturizers because it softens skin and in higher doses can be used as an exfoliator. Urea can also treat athlete's foot. However, there isn't enough urea in actual urine to support rubbing it on your face, so stick to the store-bought versions instead.

9. It can whiten your teeth.

Ancient Roman doctors actually told their patients to rinse their mouths with pee for whiter teeth. And surprisingly, this wasn't an entirely crazy idea — the ammonia in urine can actually make your teeth whiter, but good luck finding the courage to swish it around in your mouth.

Ancient Romans also used pee as invisible ink to write secret messages. The words would show up when the paper was heated. And in pre-industrial times, urine was used in cleaning fluids because of the ammonia.

10. You shouldn't drink your pee.

If you happen to be lost in the desert without water, do not drink your urine. It's full of salt, which can actually make you more dehydrated instead of quenching your thirst. In fact, the US Army Field Manual strictly advises against drinking urine for survival.

11. As a man ages, the speed of his urine stream declines.

Up until age 50, men pee faster than women. But then it starts to decline and women take the lead.

12. Shy Bladder Syndrome is a real thing.

It's called Paruresis and it's a type of phobia where people are unable to pee in public places. According to Paruresis.org, 21 million Americans suffer from this anxiety disorder.

But there are some who believe that drinking urine does has some bonus health benefits. They claim that it can cure diseases like cancer. However, there is no medical evidence to back that up.

13. Cat urine glows under a black light.

Actually, a black light can be used to detect many bodily fluids, but cat pee, in particular, lights up under the light. It contains phosphorus, which glows in the presence of oxygen, even when a black light isn't on.

14. The World Record for the longest pee is 508 seconds.

That's almost 8.5 minutes.

More Facts About Our Bodies:

• 6 Things You Didn't Know About Earwax

• All the Reasons You Stink And What to Do About Them

• 8 Random Facts About Your Eyelashes

Photo credit: Getty Images

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