A. Not necessarily. "Restricting your calorie intake over a prolonged period of time will likely slow your metabolic rate," says Elisa Zied, R.D., a spokesperson for the American Dietetic Association. "After a decade of this, your body has probably become accustomed to functioning on fewer calories, so any increase could translate into extra pounds." But the effect isn't permanent.
When you're at your heaviest, it can be intimidating to step into a gym and begin running or lifting among the spandex-clad. Working out in your own space is also simply easier to schedule—you can lift weights while the baby naps or first thing in the morning without dragging yourself out the door. "I bought an exercise bike so I can work out whenever I want," says Sarah DeArmond, who lost 100 pounds.
Protein is naturally filling and takes longer to digest than simple carbohydrates. When people drank a whey protein drink, they lost about 4 pounds more and about an inch more from their waists over 6 months and felt less hungry than people given a carbohydrate shake instead. Other research in mice, found that when mice were given extra whey protein they gained less weight and body fat and more lean muscle, even when calories were the same. Whey protein is found naturally in yogurt and other dairy.
Weight loss and weight maintenance are top concerns for most of us, but there are so many rumors and fads out there that it's hard to keep track of what really works. We've sorted through the claims by talking to registered dietitians and doctors and reading the most recent studies to give you trustworthy answers to 15 top weight loss questions, including:

Accessibility to foods: Some diet plans ship foods straight to your door, while others require you to shop for very particular ingredients. There are also a range of price points, with some diets costing substantially more than others. Consider whether the food allowed on a particular diet will fit into your budget and be relatively easy to find at grocery stores.

No, seriously. This annoying social media habit could end up helping you eat less. An analysis of attentive eating studies published in the American Journal of Clinical Nutrition showed that if people recall their last meal as being filling and satisfying, they tend to eat less during their next meal. So snap your delicious-looking food, and scroll back through your feed before you eat next.

There are many ways to do intermittent fasting — ranging from fasting for a number of hours each day up to an entire 24-hour fasting period one or two times a week. “If you're trying to kick a habit like eating late into the night, then stopping eating earlier in the evening and fasting overnight could be beneficial for you,” says Hultin. “There are many types of intermittent fasting, so ensuring you pick one that works for you and your lifestyle is important.”
Squeezing in some refreshing lemon will not only help you drink more water; it also has detox benefits which are sure to help you lose weight fast. Lemons are rich in polyphenols, which are compounds that contain antioxidants. A study in the Journal of Clinical Biochemistry found that mice who were fed lemon polyphenols were less likely to gain weight and accumulate body fat.
Where commercial weight loss programs go hands-on, the Mayo Clinic Diet goes streamlined. The vibrant, best-selling hardback (that looks a lot like a fun middle school health textbook) is the first resource for diet information, you can also employ the sleekly designed but minimalist app, plus a full website of tips, recipes, and workouts. Those patient enough to cycle through all of Mayo’s resources will find lots of solid health information.
Many diets, including Atkins and the keto diet, fit into this umbrella. A typical low-carb diet limits carbs to less than 60 g daily, but this can vary, according to the Mayo Clinic. (15) In a September 2015 review published in PLoS One, people following low-carb diets saw modest weight loss — although study authors note that long-term effects of the diet require further research. (16)
If you eat your dinner restaurant style on your plate rather than family style, helping yourself from bowls and platters on the table, you’ll lose weight. Most of us tend to eat an average of 150 percent more calories in the evening than in the morning. You’ll avoid that now because when your plate is empty, you’re finished; there’s no reaching for seconds.
“Diet and exercise are a marriage that should never divorce,” said Giancoli, noting that the benefits of exercise aren’t restricted to the sheer number of calories you burn during thirty minutes on a treadmill. (Need one of those, by the way? We have some favorites.) Instead, research shows that muscle tissue burns more calories than fat tissue, proving that “muscle mass is a key factor in weight loss.”
Fermented foods: These enhance the function of good bacteria while inhibiting the growth of bad bacteria. Sauerkraut, kimchi, kefir, yogurt, tempeh, and miso all contain good amounts of probiotics, which help to increase good bacteria. Researchers have studied kimchi widely, and study results suggest that it has anti-obesity effects. Similarly, studies have shown that kefir may help to promote weight loss in overweight women.
Scrolling through your social media one last time may be most people’s pre-bed ritual, but it can seriously mess with your sleep cycle. The light from your screen can suppress melatonin, the hormone that controls sleep. And getting plenty of shut-eye is important for your waistline; a study published in the journal Sleep found that people who didn’t get the recommended 7-8 hours of sleep a night were more at risk for weight gain. Try to put your phone away 20 minutes before your bedtime to avoid the light distraction.
"Your specific [weight loss] program may differ from someone else’s based on climate, geography, heredity, the quality of the food you’re buying, the volume in which you’re eating that food, and so much more. A lot people take advice that doesn’t honor themselves. What works for me is not going to work for you. It’s just not. So really, it’s [about] having an honest look at who you are, what your tendencies and triggers are, and how you can build a program that revolves around that.”
It sounds silly, but switching which hand you eat with can save you calories, and help boost weight loss. “It takes 15 minutes for your brain to realize that you’re full,” celebrity personal trainer Jay Cardiello told us in our article 40 Weight Loss Tips for Over 40. “To give your mind time to catch up to your mouth, simply switch your fork to non-dominate hand. It may be frustrating, but it’s a simple and unnoticeable way to curb overeating and lose weight.”
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 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.
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