The cells of obese people remembered their metabolic program, which could help explain, in part, why losing weight and maintaining weight loss is so difficult.

We found that obesity was associated with a threefold increase in SCD1 expression in obese muscle, as well as a threefold higher level of SCD1 enzyme, compared to lean muscle.

Obesity is a very complex disease, and this metabolic pathway does not fully explain obesity, but it is a likely contributor.

Obesity is a very complex disease, and this metabolic pathway probably does not fully explain obesity, but we now know that SCD1 is at least a very important contributor.

There are two important observations that might have clinical relevance.

While these findings may be somewhat discouraging news for those wishing to reverse obesity through dietary interventions, they also highlight the importance of exercise.