Left banner image adapted from amyloidosis gross node, by Ed Uthman MD, Creative Commons license

Body oils

You're oily. Not only do you sweat, but your skin has  very small sebaceous glands along the hair follicles that release an oil called sebum to keep your hair and skin moist. It's also antibacterial, and it helps waterproof that outer layer of dead skin cells.

What is it? Sebum contains triglycerides, wax esters, squalene, and cholesterol, as well as cell debris (yep, your skin is pumping out dead cell matter onto your face! And this isn't even "your body hates you" Thursday!)

Where are the glands? Everywhere except the bottom of your feet and palms of your hand. They are, expectedly, more  frequent on the scalp and face. 

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