NBCNEWS.COM - You're pressed for time, so you hit the drive-thru on the way to work. Since you're already there, you figure: Why not make it a cheat day and order a savory, cheesy breakfast sandwich? Just one won't hurt—after all, many breakfast sammies, including a McDonald's Sausage McMuffin, only register around 400 calories. What could be truly bad about that?
We hate to burst your bacon-lined bubble, but the answer is "plenty," according to new evidence. Researchers in Canada measured the blood vessel function of a group of college students on two separate occasions: once on a day they had no breakfast, and once after they consumed two fast-food breakfast sandwiches that clocked about 900 calories and 50 grams of fat total. Just two hours after eating the sandwiches, the subjects' velocity time integral—a measure of how efficiently your blood vessels function—had dropped by 15-20 percent. That means their blood vessels weren't dilating to their full capacity. click here to read more