Eek! i don't know Emma, but yesterday, I was sent a list of dangerous lipsticks and lip glosses, some of which I use! the ones to watch out for are:
Red Earth (lip gloss)
Chanel (lip conditioner)
Lancome
Clinique
YSL
Shiseido
They contain a high amount of cancer-giving lead, and to test whether any of those makes contain the high lead content in a particular colour anyone might use, take a gold ring, scratch some lipstick out of the tube and spread it across your hand, using the ring to scratch it on with. If it turns black after a while, whether on your hand or from where it was taken from the tube - don't use.