Thanks fokyc for the link - obviously this was a very high profile case and not the norm. I think mainly I would be testing toiletries and cosmetics and ocassionally medication like asthma medication etc - nothing which requires an overnight sdtay at the clinic so it should be fairly low risk.
I agree Bernadette there are better ways of earning money, but on the other hand I already work full time 40 hours, study 20 hours and there's not a lot of time for another job but I do need to find a way of making some extra cash as will end up in massive debt just for trying to pay bills and I've spent since I left home at 16 just scraping enough to get by and support myself and still got into tremendous debt. So I am looking at lots of different ways and its a good idea to accumulate as much info on anything i do before doing it.
thank you for the cautions and advice. I do tend to be a bit naive about these things - like when I went for an internview to be an escort girl thinking I was going to be going to the ballet and the opera and getting paid for it! Silly silly me!