In the study, 20 people (10 men and 10 women) were split into two groups. One 2019 study published in Cell Metabolism found that eating processed foods seems to spur people to eat more calories compared with eating unprocessed foods. Your food choices may also influence your calorie intake, and not just because of their specific calorie content. This means it became very challenging to avoid regaining some weight because of "metabolic adaptation," says Dr. The resting metabolic rate for contestants, which measures the number of calories the body uses just running its everyday functions, plummeted after their dramatic weight loss. "Researchers studying the show The Biggest Loser, which helps contestants lose large amounts of weight through a stringent plan of diet and exercise, found that after weight loss, contestants' bodies would fight back in an attempt to regain the weight," she says. This is why you might find your weight plateauing even if you are diligently dieting and exercising, and also why a majority - 96% - of people who lose a large amount of weight regain it, says Dr. Your hypothalamus, a region at the base of your brain that also regulates things like your body temperature, stands guard to keep your body weight from dipping below that set point-which is not really a bonus if you're trying to lose weight. This set point reflects several factors, including your genes, your environment, and your behaviors. Each body has a "set point" that governs weight, says Dr. This may occur because some types of organisms in the gut are able to break down and use more calories from certain foods than other types of organisms.Ģ. "Taking the gut microbiota out of people who are lean and placing it in people who have overweight or obesity can result in weight shifts," says Dr. Researchers have found that people who are naturally thin have different types of organisms living inside them than those who are overweight. Trillions of organisms live in your gut, and the predominant types may influence how many calories your body absorbs from food. Three main factors affect how your body processes calories.ġ. It's time to take a different approach, she says, putting the emphasis on improving diet quality and making sustainable lifestyle improvements to achieve a healthy weight. You can eat the exact same number of calories as someone else, yet have very different outcomes when it comes to your weight. How your body burns calories depends on a number of factors, including the type of food you eat, your body's metabolism, and even the type of organisms living in your gut. The truth is that even careful calorie calculations don't always yield uniform results. Fatima Cody Stanford, an obesity specialist and assistant professor of medicine and pediatrics at Harvard Medical School. "This idea of 'a calorie in and a calorie out' when it comes to weight loss is not only antiquated, it's just wrong," says Dr. But as it turns out, experts are learning that this decades-old strategy is actually pretty misguided. Cut calories - specifically 3,500 calories, and you'll lose a pound. Most people have been taught that losing weight is a matter of simple math. Put the focus on food quality and healthy lifestyle practices to attain a healthy weight.
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