Interesting line of evidence as to why insulinemia may cause obesity (rather than the reverse). The evidence is based on a 5-6 week long water-only fast (Fasting insulin and weight loss on a water fast). In the study referenced, the fasting insulin of the individuals was measured as they progressed on the fast.
On a water fast the higher your starting weight (surrogate for “fed” fasting insulin, remote surrogate for “starvation” fasting insulin), the less weight you lose over 5-6 weeks.
Elevated insulin is associated with obesity BECAUSE it inhibits lipolysis.