Stopping people in the normal range from gaining weight could prevent 12 percent of premature deaths, according to the research.
Scientists studied human genes, mice and flies to arrive that their conclusion.
As populations and BMIs increase so will demand for calories. A study published in Plos One projects an 80 percent increase in demand by 2100.
Losing and maintaining a healthy weight is a significant challenge for some people, scientists said.
The Texas Department of Public Safety Officers is suing the Department of Public Safety over new rules that require police officers to have waist measurements under 40 inches for men and 35 inches for women.
Celebrities and media figures weighed in after James Corden ridiculed fellow late-night TV host Bill Maher over a "fat-shaming" segment in which Maher said overweight Americans should be criticized and not simply accepted.
Philippines President Rodrigo Duterte lashed out at Senator Dick Gordon for criticizing as "dangerous" the appointment of former military officers to senior government roles.
Dean McDermott slammed social media trolls who commented on his son's body image.
"Increasing your walking pace in everyday life is a good way to increase fitness levels, particularly in those who are slow walkers," Professor Tom Yates told Newsweek.
Shark advocate Elliot Sudal described his experience as "unreal."
The bird is thought to be the most dangerous in the world.
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Chris Christie wrote that Trump asked him to wear a longer tie to help him appear skinnier.
A spokesman for the airline claimed the measure was to keep flight attendants from appearing "shabby."
Study participants were taught to identify their triggers for overeating instead of using self-criticism as their source of motivation.
The average person puts on 1 to 2lbs every year, and struggles to lose it.
"It is believed that after drinking alcohol, the amount of blood glucose in the body can rise and fall which stimulates the brain to feel hungry."
Teenagers with a high BMI showed signs of heart problems usually seen in adults.
Contestants were reportedly given Adderall and "yellow jackets," containing ephedra, which is used to lose weight. It hasn't been FDA-approved since 2004.