What are the challenges and difficulties of working in Quality Assurance?

One of the biggest challenges and difficulties in quality are when a new food law or regulation comes up and we have to implement the changes very soon in a very short time period. Nowadays the countries and governments are looking after the health of their consumers a lot more than it used to be before that's why we see more regulations and more laws popping up and we need to implement them on our products that would be the biggest challenge.