As a Men's Health subscriber, I'm also familiar with their Eat This Not That information and the book and app that have been spun out from their research. The concept's easy: If you're going to a restaurant, there are some items on the menu that are far more unhealthy than others, and with just a few smart choices or a substitution or two, you can take something that's laden in calories or fat and turn it into something, well, less unhealthy, at least.

Check it out to learn more, it's good stuff, esp. if you eat out a lot: Eat This, Not That!.

Problem is, all of this information needs to be at your fingertips, and while there's an iPhone and Android app, you still have to remember to check the app. Which is why it's cool that they've integrated directly into Foursquare. If you know how to set it up, and how to read the subtle clues when you check in at a restaurant that there's ETNT info available.

Let's have a look! Open up Foursquare on your mobile device and tap on your profile page button (lower right corner) to get to your profile. It'll look more or less like this:

And why yes, I do have a lot of checkins -- almost 7000 -- and badges -- 65! -- in Foursquare. :-)

Tap on "My Settings" near the top, once you're done admiring your own progress in the geolocation world of Foursquare...

This screen is way less colorful and interesting, but the button you want is at the top: Add and Manage Connected Apps. Tap on it and you'll find a rather astonishing list of useful and interesting apps you can connect to your Foursquare account:

Swipe down to find "Eat This, Not That!"

Sounds useful, doesn't it? Tap on "Connect App" to proceed.

The wise grasshopper would read the app's privacy policy, but if you're like me, well, you're going to skip it in the zeal to get things hooked up. Either way, you'll eventually need to tap on the bright green "Allow" button. Do so.

Booyah! We're ready to rock 'n roll. Or eat more healthy, one of the two.

That's it. Done.

But as I said, the problem is that the way these connected apps are integrated into 4Sq is less than optimal. Let's have a look by checking in to the local Burger King:

Gotta love that user comment, eh? Really makes me want to grab a quick lunch at this particular Burger King. Yikes.

Anyway, I've checked in and the grey bar along the bottom of the screen shows You're here! +1 point, 1 app.

That "1 app", that's the clue that ETNT has something to share for this venue. Incredibly subtle and incredibly easy to miss as you're perhaps in the queue to order something.

Still, if you do notice it -- and you can train yourself to look for these "1 app" messages -- you'll want to tap on that bar to find out what app and what's being reported:

That's good info. Skip the "secret" sauces and just use ketchup. Or have a salad with that burger instead of those startlingly unhealthy fries.

But there's more. Tap on the paragraph of info from ETNT and you can read more information from the team about how to eat healthy at Burger King:

It's not as good as the local health food cafe down the street, but if you are going to frequent fast food joints, adding Eat This, Not That! to your Foursquare app is a smart way to get tips on best and healthiest menu options. Good luck!