Hyperinsulinemia: Cause or Effect of Obesity?

ADS 336 X 280 Is Elevated Insulin the Cause or Effect of Obesity?

The carbohydrate hypothesis, in its most popular current incarnation, states that elevated insulin acts on fat cells to cause fat storage, leading to obesity.  This is due to its ability to increase the activity of lipoprotein lipase and decrease the activity of hormone-sensitive lipase, thus creating a net flux of fat into fat cells.  I'm still not sure why this would be the case, considering that fat tissue becomes more insulin resistant as body fat accumulates, therefore insulin action on it is not necessarily increased.  Total fat release from fat tissue increases with total fat mass (1), demonstrating that insulin is not able to do its job of suppressing fat release as effectively in people who carry excess fat.  But let's put that problem aside for the moment and keep trucking.

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