Whenever you see a new scary headline about health go here. Sandi is really smart. She doesn't just spew bullshit either. She almost always links to the original studies and sources. It will take some brains to comprehend all the science so if you are stupid, don't bother. Stick to Oprah and the rest of the talking heads on TV.
Here is a good primer on how to think.
For example, when someone you knows starts running off at the mouth about the dangers of "processed" food and nitrate/nitrites in food see this post.