Research paper
Fothergill E, Guo J, Howard L, Kerns JC, Knuth ND, Brychta R, Chen KY, Skarulis MC, Walter M, Walter PJ, Hall KD. Persistent metabolic adaptation 6 years after "The Biggest Loser" competition. Obesity. 2016;24(8):1612-1619. doi:10.1002/oby.21538
Why we cite it
Provides the most striking longitudinal demonstration of persistent metabolic adaptation after weight loss. By following Biggest Loser contestants for 6 years, the study shows that the body's metabolic defense against weight loss does not diminish with time — it actually intensifies — establishing that weight regain reflects powerful, persistent biological opposition rather than personal failure or lack of willpower.