The tip of my lip liner (or other pencil-type product) has turned white. Why is this?

The white powder-type substance on the tip means that the fatty acid, one of the ingredients, has undergone a minor crystallisation. You might feel a little hardness in your lip liner at first, but there is no cause for concern regarding usability or safety. This phenomenon can happen in pencil-type beauty products such as lipliners, eyeliners or eyebrow make-up, and is called “blooming”. This is the same phenomenon as the white discolouration sometimes seen on the surface of chocolate. It does not affect product quality.