In his latest book, Skinny Meals, author and The Biggest Loser trainer Bob Harper offers a collection of 100 recipes under 350 calories supposedly designed to jumpstart your weight loss. The trick: No carbs after lunch.

The idea of restricting carbohydrates after a certain time of day to slim down is not a new concept. And Harper doesn't eliminate all carbs post-lunch-you can have vegetables anytime of day on his plan-but he believes that going to bed a little bit hungry aids in losing pounds and digestion because your activity slows down at night.

Some science supports the idea of eating earlier in the day or cutting carbs to drop a size (or a few). And considering the kind of carbs we tend to eat at night-let's face it, most of us aren't munching on broccoli florets in front of the TV-choosing to reduce or restrict carbs makes you more mindful of evening side dishes and desserts that could sabotage your weight-loss goals.

However, many experts say it's not when you eat but how much you eat later in the day that matters. Totally contradicting Harper's advice, a 2011 study found that men who ate most of their carbs at dinner lost more weight than those who didn't.

What it all may come down to is the way you metabolize glucose says Mary Hartley, a registered dietician. "When people are insulin resistant (pre-diabetic), their blood sugar starts climbing in the morning when they first eat and stays high for the rest of the day. That can cause hunger and fat storage."

Overall, how many carbs you eat and when isn't as important as making sure you're getting all the nutrients you need, she adds.

By Dani Stone for