You may want to think twice about skimping on your cosmetics.

When you find deals online on some of your fave beauty and skincare lines, such as MAC or NARS, it’s likely too good to be true -- they’re knockoffs.

Now you may be wondering, “What’s the big deal? People buy knockoff shades, purses and clothing all the time!”

Well, just remember those counterfeit cosmetics go on your skin, and what goes on your skin gets absorbed into your body. And as it turns out, those counterfeit cosmetics contain some harmful and DISGUSTING ingredients.