I’m not sure what to make of this. I need someone more qualified to examine the study to make more sense of what the NYT is reporting. I thought some of this was already known. For example, metabolism changes with different stages of life. I’m not sure what they found is true across all populations though.
Central to their findings was that metabolism differs for all people across four distinct stages of life.
There’s infancy, up until age 1, when calorie burning is at its peak, accelerating until it is 50 percent above the adult rate.
Then, from age 1 to about age 20, metabolism gradually slows by about 3 percent a year.
From age 20 to 60, it holds steady.
And, after age 60, it declines by about 0.7 percent a year.What We Think We Know About Metabolism May Be Wrong – The New York Times (nytimes.com)
I noticed my metabolism started to slow around age 35. What else would account for no change in diet and exercise but an increase in weight? My metabolism wasn’t measured it was just something I noticed so I changed my eating habits.
I hope this gets some scrutiny from metabolic health doctors and researchers I follow so I can get some trusted opinions.