Even nutritionists with graduate degrees had said it, but it is not true that, the popular rule about losing weight which is where every 3,500 calories a person shed from their diet, a person will lose a pound. Kevin Hall, who is a researcher at the National Institute of Diabetes and Digestive and Kidney Diseases, said that he was seeing dietitians using it all the time and they even make recommendations based on it but unfortunately, Kevin Hall said it's completely wrong.

Basing on medical researcher Max Wishnofsky measurement adage dates back to the 1950s, Max Wishnofsky found that it was 3,500 kilocalories, or else known as calories. But theoretically, Wishnofsky made a couple spurious assumptions about his calculations on how many calories a person had to burn in order to lose a pound of fat.

Traci Mann, University of Minnesota psychology professor and author of "Secrets from the Eating Lab" stated, "Your metabolism slows down. Your body uses calories in the most efficient way possible. Which sounds like a good thing," Mann also explained, "But it isn't a good thing if you're trying to lose weight, because when your body finds a way to run itself on fewer calories there tends to be more left over, and those get stored as fat, which is exactly what you don't want to happen."

In the American Journal of Public Health published research, the research took nine years, where it studied more than 278,000 people in England and revealed that, "patients with a BMI of 30 or greater kilograms per meters squared, maintaining weight loss was rare and the probability of achieving normal weight was extremely low."

A leading researcher at the Anschutz Health and Wellness Center at the University of Colorado - John Peters, stated, "Over time, the more weight you lose, the more your metabolic rate drops," Peters also said, "In order to keep losing weight at the rate you started losing weight, you're going to have to eat even fewer calories. A month in, you might have to eat another hundred fewer; a month after that you might have to drop it another hundred."