I started using them at 13.. There's really no age limit. The thing is to make sure you aren't using masks you don't need yet (i.E. Wrinkle reducers at 1 and that the mask is appropriate for your skin type.

Oh ok... Thanks I was jus wonderin coz a friends sis was usin mud mask n stuff when she was 13 so I was kinda worried that she is spoilin her skin