Diets to promote weight loss are divided into four categories: low-fat, low-carbohydrate, low-calorie, and very low calorie.[27] A meta-analysis of six randomized controlled trials found no difference between the main diet types (low calorie, low carbohydrate, and low fat), with a 2–4 kilogram weight loss in all studies.[27] At two years, all of the diets in the studies that reduced calories caused equal weight loss regardless of whether changes in fat or carbohydrate consumption were emphasized.[28]
Salmon is a rich source of high-quality protein and provides plenty of "good" fats: omega-3 fatty acids. A diet rich in omega-3 fatty acids helped people feel more satisfied when they were watching their calories, per a study in Appetite. Eating salmon can be a delicious and versatile way to get your recommended two weekly servings of heart-healthy fish.

Similar to Greek yogurt, a study from Nutrition Research showed that eating eggs for breakfast can make you feel more full and help you eat fewer calories throughout the day, meaning they’re quite the secret weapon for weight loss. Nutritionally speaking, one large hard-boiled egg (about 50 grams) contains less than one gram of carbs and remains an excellent source of protein. Eggs are also loaded with amino acids, antioxidants, and healthy fats.
If you haven't jumped on the mushroom bandwagon yet, now's the time. Researchers from the University of Buffalo discovered that portobellos could help you lose weight thanks to their ability to regulate blood sugar (which can help prevent diabetes) and balance hormones. They also concluded that the fungus may help you exercise for longer periods of time, so use it as vegetarian-friendly burger base or toss into a tasty breakfast frittata.
A study in the journal Metabolism found that eating half a grapefruit before meals may help reduce visceral fat and lower cholesterol levels. Participants in the 6-week study who ate a Rio Red grapefruit fifteen minutes before each meal saw their waists shrink by up to an inch, and LDL levels drop by 18 points. Though researchers don’t exactly know what makes grapefruit so good at burning fat, they attribute the effects to a combination of phytochemicals and vitamin C found in the tart treat.

^ Jump up to: a b Vos, Miriam B.; Kaar, Jill L.; Welsh, Jean A.; Van Horn, Linda V.; Feig, Daniel I.; Anderson, Cheryl A.M.; Patel, Mahesh J.; Cruz Munos, Jessica; Krebs, Nancy F.; Xanthakos, Stavra A.; Johnson, Rachel K. (22 August 2016). "Added Sugars and Cardiovascular Disease Risk in Children". Circulation. 135 (19): e1017–e1034. doi:10.1161/CIR.0000000000000439. PMC 5365373. PMID 27550974.

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.
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