9 Disgusting Things You Didn’t Know You’ve Been Eating Your Whole Life

2 Human Hair

WikiMedia:
Listed under “ingredients” as: L-Cysteine

How we consume it: Bagels, cakes and more.

Believe it or not, this compound made from human hair and/or duck feathers is actually used as a flavor enhancer. L-Cysteine is pretty common, so don’t be surprised if you’ve already eaten some today.