15 Things You Didn’t Know About Sweat

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1. There are 2.6 million sweat glands in the average human body with the majority in your hands and feet. With 250,000 glands in your feet, a foot typically outputs a half a pint of sweat in just one day.

2. Composed of about 99 percent water, sweat evaporates on the skin’s surface, cooling the body and keeping it from overheating.

3. Each of us has a unique sweat fingerprint, but the two types of sweat glands, apocrine and eccrine, are universal to humans. We have eccrine glands over most of our bodies, but apocrine glands only in our armpits and genital region.


4. The normal human being sweats around 278 gallons each year

5. An estimated 360 million people worldwide suffer from “extreme” sweating.

6. Horses and apes both sweat from their armpits, like humans. Cows sweat through their noses. A hippo’s sweat is red.

7. If you’re sweating red and you’re not a hippo, you might have a rare condition called hematohidrosis. Blood vessels rupture and run into sweat glands in affected individuals, causing them to actually sweat blood.

8. Another rare condition, chromhidrosis, causes humans to sweat orange, blue or other colors. While the condition can sometimes be traced to ingesting certain drugs, the cause often remains a mystery in otherwise healthy people.

9. The purpose of sweat is to cool you down, using your body’s water in the process. Dehydration happens when you are losing more liquid than you are taking in. Without sweat, your body stops working properly.
10. Your feet have over 250,000 sweat glands.

11. Not all humans sweat equally. Men sweat up to twice as much as women, and both sexes sweat less with age.

12. It’s no mystery, however, why the sweat of healthy people often smells different from that of sick individuals. The body emits volatile organic compounds based on metabolic condition, which can change when disease or infection is present.

13. Emotions can change the smell of your sweat.

14. Aside from humans, horses are one of the few mammals that thermoregulate by sweating. Horse sweat is high in latherin, a protein that helps the water in sweat travel from the skin, past the animals’ heavy waterproof pelt and to the air, where it can evaporate and keep them cool.

15. Cystic fibrosis can be detected with a sweat test. Sodium and chloride are much more concentrated in the sweat of individuals with the condition.


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