I guess the thing is LOADS of things that are damaging can be sold so long as they don't kill you that second. Wax on apples, cigarettes, oh on and on and on really. But the point is eliminating products which are known to be damaging can surely only help improve your health and reduce your risk of cancer etc.

I didn't realise the extent of the nasty products in vicks, or how bad eucalyptus oil can be so thanks everyone for your input!