There’s a large spectrum of where people can fall on a vegetarian diet: For example, vegans consume no animal products, whereas ovo-lacto vegetarians eat both dairy and eggs. The eating style may help with weight loss, suggests a review published in August 2017 in Nutrients, but some vegans and vegetarians may become deficient in specific nutrients, such as calcium, iron, zinc, and vitamin B12, according to an article published in December 2017 in Nutrition, Metabolism and Cardiovascular Diseases. (23,24)
If you like eating meat and want to lose weight, you might be tempted to try this recent extreme diet fad that proponents have made some pretty outrageous claims about. One: that eating nothing but meat can cure you of autoimmune diseases. The problem is that there’s no good research to support that notion, or any other health claim, for that matter. Indeed, omitting foods known to be good for you — fruits and veggies among them — can lead to a bunch of unwanted side effects, including constipation and potentially dangerous nutrient deficiencies. Still, since you’re cutting out so many food groups, there’s a decent chance you’ll lose weight, experts say. Regardless of any possible benefits you might see, this restrictive approach is definitely one you’ll want to ask your doc about before you even consider diving in.
It’s important to do full-body strength training if you want to lose belly fat—especially if you’re trying to keep it off for the long haul. “Strength training should be a part of just about everybody’s exercise plan,” says Dr. Cheskin. That’s because strength training helps you build muscle, which will replace body fat. And because muscle is metabolically active, you'll continue to burn calories after working out, thereby, reducing overall body fat. Bonus: When your metabolic rate becomes faster due to muscle growth, you’ll have a little more wiggle room in your diet if that’s something you struggle with, says Dr. Cheskin.
According to its fervent proponents, humans were not made to be eating constantly; rather, we were designed to eat for short periods of time followed by hours (and sometimes days) of fasting. Much like vegetarianism, intermittent fasting is practiced for two main reasons: health and religion/spirituality. There are no food or caloric restrictions, but rather a restriction on WHEN to eat. The most popular methods include the 16/8 (8 hours of eating followed by 16 hours of fasting), the “Eat-Stop-Eat” method (two 24-hour fasts per week on non-consecutive days); and the 5/2 method (only 500 calories for 2 non-consecutive days, and 5 days of normal eating per week). While it's generally considered a healthy approach to eating when done moderately, some studies suggest extreme fasting may lead to hair loss and anxiety. 
The power of emotional eating should never be underestimated, as it is a strong factor in determining whether or not you'll be successful on a diet. When you eat less than you should, you inevitably get hungry, after which you might feel angry, and once this happens the “hangry” stage sets in and you’ll feel more inclined to skip the diet altogether or go on a food binge. For this reason, most successful diet plans prioritize satiety or the feeling of “fullness.” 
To prep his patients for success, Dr. Seltzer tells them to plan around a large evening meal by eating a lighter breakfast and lunch—NBD since most people who eat a meal before bed tend to wake up feeling relatively full, he says. Research suggests balanced bedtime meals may also promote steady next-day blood sugar levels, which also helps with appetite regulation.
Ansari says alcohol can prevent weight-loss in several ways, including the fact that heavy alcohol intake can stimulate food intake. "Binge drinking can overload the liver. The liver then prioritizes processing alcohol over other nutrients and then stores the protein, carbs, and fat as fat in the body," Ansari explains. The Centers for Disease Control and Prevention (CDC) defines binge drinking as having five or more drinks for men, and four or more drinks for women in two hours. "Also, alcoholic beverages are often mixed with sugar-rich beverages. Drinking more than moderate amounts of alcohol can cause calories to add up quickly."
Rather than rely entirely on the information provided by the companies to determine weight management effectiveness, we spent weeks browsing through hundreds of unpaid customer testimonies (not endorsed by any company) to get a feeling on the accuracy of the claims they make. In fact, these testimonials provided us with a much more truthful and in-depth insight regarding how effective diet plans really are. 
If you’re only getting a minimal amount of sleep each night, that leaves more time for you to snack and make otherwise unhealthy decisions that could affect your weight loss. Although it will vary from person to person on how much sleep you actually need to be most effective (and therefore make progress toward your weight loss goals), the ideal number is typically 7 or 8 hours, says Dr. Cheskin.

Going long periods of time without food does double-duty harm on our healthy eating efforts by both slowing down your metabolism, and priming you for another binge later in the day. (Think: You've skipped breakfast and lunch, so you're ready to takedown a whole turkey by dinner!) Make it your mission to eat three meals and two snacks every day, and don't wait longer than three to four hours without eating. Set a "snack alarm" on your phone if needed.
"How easy it is for someone to lose 10 pounds depends on a lot of things: age, gender, activity level, basal metabolic rate, and how much weight he or she has to lose" explains Kate Huether, MD, of The ReKovery MD, who also holds a master's degree in nutrition. "If someone is very overweight it is easier to lose excess weight as opposed to someone who is thinner," Dr. Huether adds.
Because of its focus on frequent meals, portion control, mindful eating, proper hydration, and exercise, the company claims (and some studies show) you’ll lose between 8 to 13 pounds in the first phase, and an average of 1 to 2 pounds per week. After reading client testimonies posted on the web, we feel these numbers to be fairly accurate of South Beach Diet’s effectiveness.
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.
"Stepping on the scale frequently makes you aware of small changes and helps you quickly react to those changes. The National Weight Control Registry, a large group of people who have successfully lost at least 30 pounds and kept it off for 5 years, found that successful 'losers' weigh themselves often and make adjustments accordingly. When you begin to understand that sodium, carb intake, hormones and alcohol intake can impact weight and that it isn't possible to gain 2 pounds of fat overnight, you will begin to better understand your body. The key is to pay attention to overall trends; don't obsess over day-to-day numbers! — Jennifer McDaniel, MS, RDN, CSSD, LD, food and nutrition expert
The number of calories you need to maintain or lose weight depends on a number of factors, including your age, sex, height, and level of physical activity, according to the FDA. To maintain a healthy body weight, the FDA recommends that you balance the number of calories you consume with the number of calories you burn through physical activity and your body’s metabolic processes. As a rule of thumb, the FDA recommends a standard 2,000 calorie diet for the average adult.
"The best thing you can do for your belly is to give up processed foods. A study in the journal Food & Nutrition Research found that our bodies burn only 50 percent as many calories digesting processed foods as they do real foods. So it's like eating twice as much, even if the calories are the same!" — Mark Langowski, celebrity trainer, CEO and Founder of Body By Mark 
Why couldn’t we review for taste? Due to freshness and food safety concerns, the three meal-delivery companies that made our cut (South Beach Diet, Diet-to-Go, and Nutrisystem) only ship inside the continental US, meaning delivery is not available to Alaska, Hawaii, and other US territories. ConsumersAdvocate is headquartered in Dorado, Puerto Rico, which made it virtually impossible for our team to actually try the food prepared by the diet companies being reviewed. To make up for this obstacle, we read hundreds of customer and expert reviews regarding the taste of the food prepared by the companies that made our “best” list. We will continue trying to get the food delivered to our offices; if and when that happens, we will review the meals for taste and upgrade this article accordingly. 
Weight loss ultimately comes back to the concept of calories in, calories out: Eat less than you burn and you’ll lose weight. And while it’s possible to lose water weight quickly on a low-carb diet, I certainly wouldn’t advocate for it. The diet itself can trick you into thinking that this eating style is working — when really, you might gain back what you lost as soon as you eat carbs again. That can feel incredibly dispiriting if you want results that last longer than a week.
If you like eating meat and want to lose weight, you might be tempted to try this recent extreme diet fad that proponents have made some pretty outrageous claims about. One: that eating nothing but meat can cure you of autoimmune diseases. The problem is that there’s no good research to support that notion, or any other health claim, for that matter. Indeed, omitting foods known to be good for you — fruits and veggies among them — can lead to a bunch of unwanted side effects, including constipation and potentially dangerous nutrient deficiencies. Still, since you’re cutting out so many food groups, there’s a decent chance you’ll lose weight, experts say. Regardless of any possible benefits you might see, this restrictive approach is definitely one you’ll want to ask your doc about before you even consider diving in.
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