I recently bought some white peppercorns from an Asian market. When I looked at the bottle later, I realized there was a green sticker on the back that said treated with radiation. I am wondering if this is a common and safe way to treat peppercorns and other spices. I am not worried about them being radioactive or anything like that but that they are trying to kill really harmful bacteria from sub-standard handling and processing practices. Any advice? Thanks.