And the reason is only the missing of one hormone, and fat cells won't store energy. The opposite also true, there are people with too much insulin that will gain allot weight.
> Despite intensive research, the causes of the obesity epidemic remain incompletely understood and conventional calorie-restricted diets continue to lack long-term efficacy.
> Despite intensive research, the causes of the obesity epidemic remain incompletely understood and conventional calorie-restricted diets continue to lack long-term efficacy.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6082688/