On the face of it, it hardly seemed fair.

Researchers put women on a low-carb diet up against women on a low-calorie diet -- but with a huge catch: The low-carb eaters would stick to the plan for just two days a week… and eat whatever they wanted the rest of the time.

The low-calorie dieters, on the other hand, would commit to their diet 24/7.

Now, it's been proven in the past that going low-carb is better than going low-cal any day of the week. But two days a week versus seven? How could it possibly compete?

Turns out very well -- because after four weeks, the low-carb dieters lost more weight and had better insulin readings.

It's like winning a fight with both hands tied behind your back.

The study actually involved three groups of women: Two went low-carb for two days a week. One got to eat as much as they wanted as long as they kept the carbs to 50 grams or less… while the other had to practically starve for those two days, eating just 650 calories of low-carb food.

The third group had to stick a version of the Mediterranean Diet every single day, and limit themselves to just 1,500 calories.

Two months later, and both sets of low-carb women lost an average of 9 pounds -- while the calorie counters lost just 4 pounds. In addition, the women in both low-carb groups lowered their insulin levels by 18 percent -- versus just 4 percent among low-calorie eaters.

And for the cherry on top, the low-cal women were twice as likely to quit the study as those who went low-carb -- but that's hardly a surprise. Nearly everyone has tried calorie counting at some point… and nearly everyone has failed at it.

It's impossible because it's unnatural. When you're hungry, the instinct is to eat until you're full -- and the low-carb diet allows you to do just that.

What's more, low-carb diets have also been shown to lower blood pressure levels, improve HDL cholesterol, slash triglycerides, and dramatically reduce your risk of diabetes.

The best way to get all those benefits -- and more -- is to go full time on your own low-carb diet. The women in the study were allowed to eat whatever they wanted for five days a week -- but they didn't.

Instead, their healthy low-carb habits carried over into the rest of the week, on their "off days," once they realized how much good it was doing them.

Give it a shot yourself and you'll find out why.