All of these are real headlines, but none of them are really what they seem. The story doesn't always match what the headline implies. The goal of these headlines is to get people to read the articles (obviously), but it seems that in many cases the result is that people remember the headlines rather than the actual story.
Go ahead. Click on the first headline. Be sure to read down to the part where the nutrition expert says he does not recommend that you lose weight by eating junk food.
Click on the second one and get "the rest of the story."
Check the third one while you're at it.
Don't automatically believe the headlines, whether they're online, on TV, or coming out of people's mouths.