The researchers hypothesize that participants who abstained from animal products dropped significantly more pounds since plant-based foods include loads of filling fiber and slow-to-digest complex carbs. Though more research is needed to confirm these results, the study authors write, "Vegetarian diets appeared to have significant benefits on weight reduction compared to non-vegetarian diets."
The easier it is to seamlessly fit a diet plan into your life without major lifestyle changes, the better. After all, by focusing on holistic long-term results rather than trendy short-term solutions, sustainability becomes the number one enemy of the feared “yo-yo” effect. During our investigative process, we asked ourselves: What makes a diet plan sustainable? After long hours of research, we decided that the following factors can determine a plan’s sustainability, and thus its odds of success: 
"People should pick activities they enjoy and that fit into their lifestyle in order to increase their chances of sticking with it to lose the last 10 pounds. For those who have hit a weight-loss plateau and can't seem to lose that weight, you'll need to mix things up in order to see results. Tabata-style training, HIIT classes and resistance training can all be effective weight-loss modalities for the right person." — Timothy Lyman, ACE certified personal trainer and Director of Training Programs at Fleet Feet Pittsburgh
We're taking advantage of all the healthy items you can find at Trader Joe's to create these healthy meal-prep lunches. To add extra protein (while minimizing prep time), we're using Trader Joe's fully cooked quinoa and cooked shrimp, both of which you can find in the freezer section. With a few more simple items, including bottled salad dressing, you'll have all the ingredients you need to make these high protein lunch bowls in under 20 minutes.
Real talk: It could take weeks or months to see the metabolic effects of exercise on the scale, and even then, building muscle, which is denser than body fat, could lead to weight gain. "Do what you like because it’s good for you," Dr. Seltzer says, noting the way exercise is awesome for your heart, mental health, and more—and that not all measure of progress can be seen on the scale.

There’s a reason everyone harps on about protein: Not only does it help keep you full, but it’s also responsible for repairing the tiny tears caused by strength training in your muscles. This helps them grow bigger and stronger, nudging out body fat in the process. As a general rule of thumb, aim to get at least 70 grams of protein throughout the day, says Dr. Cheskin.


Many diet plans cut out entire food groups, which can create nutrient deficiencies as well as health problems. For instance, if the diet is very low in carbohydrates and you have type 1 diabetes or type 2 diabetes, it’s probably not a good fit. And if it’s too restrictive and you’re pregnant or breastfeeding, it’s not a good idea, either. Keep in mind that pregnancy is not a time for weight loss. Speak with your doctor before making any changes to your diet if you are pregnant or breast-feeding.
Processed, packaged foods are often loaded with more salt, sugar, and refined carbs than you’d put in the foods you cook for yourself. When you’re looking to drop weight fast, avoid foods that come in packages and stick to whole, unprocessed foods. Build your plates with non-starchy veggies, unprocessed whole grains, lean proteins, and healthy fats, and season with spices, not salt.
It can actually help you cut back on calories. That's because capsaicin, a compound found in jalapeño and cayenne peppers, may (slightly) increase your body's release of stress hormones such as adrenaline, which can speed up your ability to burn calories. What's more, eating hot peppers may help slow you down. You're less likely to wolfed down that plate of spicy spaghetti — and therefore stay more mindful of when you're full. Some great adds besides hot peppers: ginger and turmeric.
Consequently, researchers have widely discredited the hCG diet, which involves using hCG injections, pellets, sprays, or drops, and consuming  as few as 500 calories daily. The diet is problematic not only because there’s a lack of research on hCG supplements, but also because the calorie requirement is dangerously low, potentially leading to nutrient deficiencies, fatigue, hormone imbalances, blood clots, and other issues. Thus, most experts agree the hCG diet is not safe for anyone, the Mayo Clinic notes. (35)

After subscribing and placing your order, you’ll receive your weekly meal plan at home in a recyclable package. And, if you live in certain areas, you could also get your food at one of the company’s 200 local pick-up locations. One curious aspect of these locations is that most of them are located in fitness centers, so you can get your sweat on while picking your food. 


Even if you suffer from obesity, you don’t have to reach a “normal” BMI (more on this concept later) to reap the benefits that come with shedding some pounds. According to a Center for Disease Control and Prevention study, even a moderate weight loss ranging from 5 to 10 percent of the initial body weight can help you curb and prevent obesity-related illnesses. 
The best diet for losing weight is Weight Watchers, according to the experts who rated the diets below for U.S. News. Volumetrics came in second, and the Flexitarian Diet, Jenny Craig and the vegan diet were third on this overall weight loss ranking list, which takes into account short-term and long-term weight loss scores. Some other diets performed as well or better in our rankings for enabling fast weight loss, but long-term weight loss is more important for your health.

The Dietary Approach to Stop Hypertension, like the TLC described earlier, is endorsed by the National Heart, Lung, and Blood Association, the American Heart Association, and the 2015 Dietary Guide for Americans. It was developed with the purpose of helping people reduce blood pressure, prioritize the consumption of calcium, potassium, and magnesium, and, most importantly, abstain from sodium.
"What I don't like about any commercial diet is that the focus is not on your actual food choices," Hogan said. "It's about calories or points or numbers, and that really takes away from your ability to be in tune with your hunger cues and your fullness cues and what you're really craving. If we become more in tune with those things, we naturally consume how much the body needs. Paying too much attention to numbers takes away from that."
"To lose weight you should primarily eat whole foods, but don't eliminate your favorites. Consistently eating nutrient-dense food on a day-to-day basis will improve the chances of upregulating metabolism and of eliminating nutritional deficiencies. That may mean tracking what you eat in some way at first, but it doesn't mean ruling out entire food groups or foods you love. Consistent quality nutrition while learning to enjoy treats in moderation will set you up for long-term sustainable success. — Victoria Viola, PN Certified Nutrition Coach, NSCA CPT, Co-Founder, Excelerate Wellness, LLC
Variety: Nobody wants to eat the same thing day in and day out. That's why a variety of food items is essential for a diet plan to be sustainable. Also, variety as a criterion for determining the best diet plans refers not only to food items but also to groups of people. For example: Is the diet plan available to diabetics? Men? Women? People with allergies or special conditions?

It seems counterintuitive to drink lots of water when you’re looking to lose weight fast—especially water weight—but staying hydrated is one of the most important steps you can take to lose weight. People often mistake thirst for hunger, so staying hydrated allows you to be more in touch with the times when you are actually hungry, rather than just thirsty. Plus, a lot of good things happen to your body when you drink enough fluids.
After a free diet analysis based on your Body Mass Index and submitting your ideal weight, Nutrisystem will recommend a plan to help you reach your goal. This plan is designed by nutritionists and allows for six meals a day (4 of them delivered by Nutrisystem and 2 to be prepared by you, following Nutrisystem’s guidance and recipes). This way you won’t be hungry for long, making it easier to stick to the diet plan until its completion.

Right now, this is the trendiest of all diet theories. It prioritizes the consumption of foods high in protein and fat while limiting the number of carbs per day to less than 20%. This means abstaining from grains, starchy vegetables, and fruits, and filling up on protein and fat. The most famous of all low-carb plans is the Keto Diet, an approach based on the metabolic process of ketosis, which happens when you restrict your carb intake to less than 0.7 grams per day and your body starts using fat, and not carbs, as its main fuel. 


"People should pick activities they enjoy and that fit into their lifestyle in order to increase their chances of sticking with it to lose the last 10 pounds. For those who have hit a weight-loss plateau and can't seem to lose that weight, you'll need to mix things up in order to see results. Tabata-style training, HIIT classes and resistance training can all be effective weight-loss modalities for the right person." — Timothy Lyman, ACE certified personal trainer and Director of Training Programs at Fleet Feet Pittsburgh
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