Unfortunately, excessive litigation is one of the downsides of an under regulated society. If our only protection from corporations is lawsuits then we shouldn't be surprised that people bring a lot of lawsuits.
Companies don't need the threat of litigation to hide information about products. That's why departments like the FDA and USDA were created to begin with. For example, people were selling crude oil as medicine, and people were selling tape worm eggs a weight-loss pills.
Being afraid of potential risks, even if there are none, reduces transparency.