Food & Water Watch does an excellent job of keeping tabs on the food safety issues I care about. It would be a full-time job to stay updated myself. Their petitions are simple, to the point, and easy to share.
Food & Water Watch works to ensure the food, water and fish we consume is safe, accessible and sustainable. So we can all enjoy and trust in what we eat and drink, we help people take charge of where their food comes from, keep clean, affordable, public tap water flowing freely to our homes, protect the environmental quality of oceans, force government to do its job protecting citizens, and educate about the importance of keeping shared resources under public control.