We pulled the top 14 of the best commercial diets (marketed to the public for profit) and the top 12 of the best diets overall. We also threw five of the most popular diet apps into the mix. Since these are largely tracking devices that don’t espouse unique eating habits, they don’t appear to meet US News’ definition of diet, but are still potentially effective weight loss tools.
While any diet that reduces your intake of fat, sugar, and carbohydrates will help you lose weight, a weight-loss plan can offer you much more and give you a much better chance of long-term success. As weight-loss plans have been developed by dietitians, fitness coaches and nutritionists, they are designed to help you lose weight safely and progressively, while altering your attitude to food and encouraging you to adopt healthier habits.
Skimp on fluids, and your body will release an antidiuretic hormone that leads to water retention that could affect the scale, Dr. Setlzer says. While this sneaky effect is one reason why the scale is a poor measure of body mass loss, you can outsmart it by drinking more—particularly if you fill your glass with water or non-calorie alternatives like unsweetened coffee and tea.

Dairy products such as cream and cheeses. They work well in cooking as they satisfy. The problem is if you’re munching a lot of cheese in front of the TV in the evening… without being hungry. Be careful with that. Or lots of cream with dessert, when you’re actually already full and just keep eating because it tastes good. Or another common culprit: loads of heavy cream in the coffee, many times per day.

Losing weight on autopilot is appealing. But in the age of meal-delivery services (Blue Apron happens to be Whole 30-approved) — is there really a market need for gimmicky Nutrisystem? Our taste buds tell us no. You could easily recreate its no-prep diet by stocking up on breakfast bars, Lean Cuisine lunches, and signing up with the likes of HelloFresh for fast, healthy dinners. (Rough calculations tell us this approach would be equal or less than the monthly price of Nutrisystem.)
Almost a year and a half later, in the summer of 2006, I finally reached my goal weight of 130 pounds. My weight loss didn’t happen overnight – in fact, it took a pretty long time – but that was because I wasn’t “dieting.” Through trial and error and figuring out what worked best for me, I made lifestyle changes, which have stuck with me to today. For example, I almost always have oatmeal with nut butter and some fruit for breakfast. It helps set a healthy tone for my whole day, plus it keeps me full until lunchtime.
You already know that a perfect diet doesn't exist, but many of us still can't resist the urge to kick ourselves when we indulge, eat too much, or get thrown off course from restrictive diets. The problem: This only makes it more difficult, stressful, and downright impossible to lose weight. So rather than beating yourself up for eating foods you think you shouldn't, let it go. Treating yourself to about 200 calories worth of deliciousness each day — something that feels indulgent to you — can help you stay on track for the long-haul, so allow yourself to eat, breathe, and indulge. Food should be joyful, not agonizing!
About: Rachael’s got a unique combination of expertise. She’s an avid fitness lover, a health fanatic and a registered nurse. She also has to combat strange work hours to keep up her active lifestyle and exercise regimen, which is exactly why we picked her. When you’re among those who are trying to lose weight but have a hectic schedule, Rachael’s the blogger to turn to for advice. She knows how to fight obstacles like sleep deprivation, food cravings, boredom hunger and (of course) being “too busy” to get healthy.
If you’re looking for a writer to follow who’s still in the midst of their own weight loss journey (and willing to admit might always be), Amy is your girl. She blogs about the ups, downs, and challenges on her path to weight loss on Not Afraid of Stripes. She doesn’t hesitate to share her insecurities or efforts to improve her own body image. Visit the blog. 
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