Now tea tree oil can work both ways. Some poeple are VERYallergic to it (me) and others find it helps with itching and scratching.
What I really object to is all those pills that claim to 'burn fat' or 'soak up fat' when all they do is expand in your gut and make you feel full.
Some things are dangerous if you're on other pills too. For example, ginseng, that some people take to boost virility, can cancel out the benefits of beta blockers thus being dangerous to heart patients who have had them prescribed.