Ladies, if you like smearing bat poop on your face, try knockoff make up.

LONDON — If you like high-end, branded products but don’t always shell out for the real deal, you might be a bit grossed out by a warning made on Monday by police in London.

Cyanide, arsenic, mercury, lead, poison, rat droppings and even human pee have been found in lab tests on fake makeup seized by City of London police.

As well as being disgusting, they warn that fake makeup can cause skin irritation, allergic reactions, swelling, rashes and burns.

“Beauty products are meant to enhance your features however the fakes can in fact do quite the opposite. Our general rule is; if it seems too good to be true then it probably is,” Maria Woodall, detective superintendent with the City of London Police said in a statement.

Read more: Mashable