For a 2,000-calorie daily diet, aim for 2½ cups of vegetables and 2 cups of fruit a day. If you consume more calories, aim for more produce; if you consume fewer calories, you can eat less. Include green, orange, red, blue/purple, and yellow vegetables and fruits. In addition to the fiber, the nutrients and phytochemicals in these foods may help protect against certain types of cancer and other diseases. Legumes, rich in fiber, can count as vegetables (though they have more calories than most vegetables). For more fiber, choose whole fruits over juice.

Dietary cholesterol is only found in animal products such as meat, eggs, and dairy. The effect of dietary cholesterol on blood cholesterol levels is controversial. Some studies have found a link between cholesterol consumption and serum cholesterol levels.[44] Other studies have not found a link between eating cholesterol and blood levels of cholesterol.[45]
^ Biesiekierski JR (2017). "What is gluten?". J Gastroenterol Hepatol (Review). 32 Suppl 1: 78–81. doi:10.1111/jgh.13703. PMID 28244676. Similar proteins to the gliadin found in wheat exist as secalin in rye, hordein in barley, and avenins in oats and are collectively referred to as “gluten.” Derivatives of these grains such as triticale and malt and other ancient wheat varieties such as spelt and kamut also contain gluten. The gluten found in all of these grains has been identified as the component capable of triggering the immune-mediated disorder, coeliac disease.
You may not think of them as a weight-loss food, but eggs are packed with protein, which helps curb your appetite. One study found that overweight women who ate eggs for breakfast were able to lose twice as much weight as women who started their days with bagels. And egg whites in particular are a good source of branched-chain amino acids, which help keep your metabolism running smoothly.
These tiny fish are the unsung stars of the sea. With 23 grams of protein per can and a truckload of omega-3 and omega-6 fatty acids, they're an easy way to load up on nutrients. They're also low in mercury and high in calcium, making them a smart fish pick for pregnant women. If the flavor doesn't appeal to you, soak them in milk for an hour to help cut down on the fishiness.
Fruit and vegetables are low in calories and nutrient dense, which means they are packed with vitamins, minerals, antioxidants, and fiber. Focus on eating the recommended daily amount of at least five servings of fruit and vegetables and it will naturally fill you up and help you cut back on unhealthy foods. A serving is half a cup of raw fruit or veg or a small apple or banana, for example. Most of us need to double the amount we currently eat. 

The next time you're craving some crunch, drop the potato chips and grab celery. The veggie is essentially all water and fiber — two things that fill you up quickly — and while one cup of chips can be upward of 160 calories, celery only contains about 14 calories per cup, chopped. Dip them in a serving of natural peanut butter (it's best if the ingredients list only has peanuts and salt on it) or hummus for a healthy snack.
Avocados are rich in monounsaturated fatty acids, dietary fiber, potassium and phytochemicals. People who eat avocados tend to have lower BMI, body weight and waist circumference than people who skip this green superfood, per a study in Nutrition Journal. While avocados are higher in calories than other fruits and vegetables, their satisfying fat and fiber combo may help you slim down. Add some to your salad, sandwich or taco night for a burst of creaminess and flavor.

When it comes to condiments, mustard is about as healthy and low cal as it gets, and the pungent yellow stuff that contains about 5 calories per teaspoon has also been found to stimulate weight loss. Scientists at England’s Oxford Polytechnic Institute found that eating just one teaspoon of mustard can boost the metabolism by up to 25 percent for several hours after it’s been consumed. Researchers attribute this to capsaicin and allyl isothiocyanates, phytochemicals that give the mustard its characteristic flavor. So instead of reaching for the sickeningly sweet ketchup, make sure you have mustard on hand at your next BBQ.
Spirulina is a powdered, high-protein seaweed supplement. The dried stuff is about 60 percent protein, and, like quinoa, it’s a complete protein, meaning it can be converted directly into muscle in the body and is thus a great weight loss tool. A tablespoon of the blue-green algae delivers 8 grams of metabolism-boosting protein for just 43 calories, plus half a day’s allotment of vitamin B12, which in and of itself can give you more energy and boost your metabolism. Try tossing some spirulina into a smoothie and watching the pounds melt off. For more skinny smoothie ideas, check out this list of smoothie recipes for weight loss!
If you want to sip your way to a faster metabolism, pour yourself a cup of green tea. The beverage is filled with powerful antioxidants that can help fight inflammation, burn fat, and increase energy. According to one study, drinking five cups a day could help you lose twice as much weight, mainly in your midsection. And drinking green tea could also reduce risk of Parkinson's disease, as well as ovarian, colorectal, skin, and prostate cancers.
Though we singled out quinoa above, whole grains in general (we’re talking cereal, rice, pasta, and more) are conducive to weight loss, especially when they’re used in place of refined—white—grains. In fact, a study published in the American Journal of Clinical Nutrition found that substituting whole grains for refined grains in the diet increases calorie loss by reducing calories retained during digestion and speeding up metabolism. Unlike refined grains, whole grains are packed with satiating, heart-healthy fiber.
^ Biesiekierski JR (2017). "What is gluten?". J Gastroenterol Hepatol (Review). 32 Suppl 1: 78–81. doi:10.1111/jgh.13703. PMID 28244676. Similar proteins to the gliadin found in wheat exist as secalin in rye, hordein in barley, and avenins in oats and are collectively referred to as “gluten.” Derivatives of these grains such as triticale and malt and other ancient wheat varieties such as spelt and kamut also contain gluten. The gluten found in all of these grains has been identified as the component capable of triggering the immune-mediated disorder, coeliac disease.
Good news, wine drinkers. Thanks to resveratrol, an antioxidant found in grape skin, drinking red wine in moderation can be part of a healthy diet. Some studies suggest that people who drink wine have smaller waists and less abdominal fat than those who drink mainly liquor. And having one glass of red wine can increase your body's calorie burn for up to 90 minutes afterwards. The antioxidants in wine might even help your body prevent cancer and improve heart health. Just be sure to stick to no more than a glass a day—the calories can add up fast.
Stephen Colbert may be on to something. UCLA Center for Human Nutrition researchers divided study participants into two groups, each of which were fed a nearly identical low-cal diet for 12-weeks. The only difference between the groups was what they were given to eat as an afternoon snack. One group ate 220-calories of pretzels while the other group munched on 240-calories worth of pistachios. Just four weeks into the study, the pistachio group had reduced their BMI by a point, while the pretzel-eating group stayed the same, and their cholesterol and triglyceride levels showed improvements as well.

With its trifecta of carbs, protein, and fat, Greek yogurt can keep you full and ward off hunger by keeping blood sugar levels steady. Instead of choosing the non-fat kind, go for 2 percent or one with whole milk—selecting non-fat is a surefire way to wind up hungry soon after downing your meal. A single cup of Fage Total 2 Percent has 170 calories, 4.5 grams of fat, and a whopping 23 grams of protein.
There's a reason (well actually, many reasons) why lentils are considered one of the world's healthiest foods. With 13 grams of protein and 11 grams of fiber per serving, this legume—another member of the pulse family—will keep you feeling full for hours in between meals. They're a great source of fat-burning resistant starch, too, with 3.4 grams in a half-cup serving.

Cabbage is rich in antioxidants and vitamin C but extremely low in calories (just 22 per cup), so you can fill your plate with the leafy green guilt-free. And while you're probably familiar with the infamous Cabbage Soup Diet, there are plenty of alternate ways to eat this veggie that won't leave you feeling hungry. It's delicious in a variety of slaws or salads, and makes a crunchy garnish atop tacos or burgers.

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