15 healthy eating habits that work, according to science

There's a fad diet for practically everyone.

But as fun as the diets may seem, it's often difficult to stick with them for more than a few weeks. As a result few people actually see any long-term results.

Rather than trying one of those, here are 15 science-backed habits that can help boost your health and may help with weight loss as well.

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Eat food you enjoy.

It may seem as if the easiest way to lose weight is to stop eating the foods you overindulge in. But this can be short-sighted, Lisa Sasson, a New York University nutrition professor, told Business Insider in 2015. "If you pick a diet with foods you don't like, you're doomed to fail," Sasson said. Food is a pleasurable experience; if you cut out all the foods you like, you probably won't stick to your plan.

And as studiescontinue to show, coming up with an eating regimen you can stick with is critical.

Portion sizes are key.

There's a psychological component to eating, especially when you have weight loss in mind. Being conscious of losing weight and sticking to the right portion sizes is half the battle, Sasson said. This phenomenon is why most people in studies lose weight, regardless of whether they're in the group assigned a special diet. Simply being studied can lead to people being more conscious of what they're eating.

But overall, keeping an eye on portion sizes is a great way to help avoid overeating— especially with portion sizes rising since the 1970s.

Skip the restaurant and pack your lunch.

Portion sizes in American restaurants have increased by as much as three times in the past 20 years, and it is changing what we think of as a normal meal.

"One way to keep calories in check is to keep food portions no larger than the size of your fist," Elizabeth G. Nabel, director of NIH's National Heart, Lung, and Blood Institute, writes.

If you're trying to control your portion sizes, it is best to pack your own lunch because restaurants will give you more calories than you need.