Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: bismuth oxychloride- not natural! BAD

I have used this stuff for 2 years thinking its "good" for my skin! only to find out after some research (finding the ingredients was a task in itself), that it contains a lead byproduct that irritates and causes breakouts! how annoying!!! they claim its "natural" and free of chemicals, bull!!!! there are other mineral make-ups out there that do not contain bismuth oxychloride. [...]. If you have problem/blemished skin, i would avoid this bismuth oxychloride, as it states it specifically "can" cause break-outs. uggg....