The quest for eternal youth has led to some weird skincare ingredients. Egg yolk and cream cheese probably aren't things you want to rub all over your face, but they're not even close to being the most disgusting ingredients found in face creams, serums, ampoules, and numerous other everyday cosmetics products. With all the Leaping Bunny symbols and heart-shaped ears declaring PETA-approved, cruelty-free products, it’s surprising to find so many companies that don’t seem to give a hoot about having products filled with animal bits in them. Think you can stomach the grossest things in skincare products that go on your face? Read on.