Is too much insulin the cause of common obesity? Yes, most likely.
Here’s another embarrassing high-profile study for all insulin deniers out there: Rats genetically modified to secrete less insulin from their pancreas stay slim even on a diet that makes other rats fat. Apart from the pancreatic insulin there was no difference between the slim (low insulin) and the fat (high insulin) rats.
The researchers, publishing the study in the high-impact journal Cell Metabolism, conclude that too much fat-storing insulin is a necessary cause of common diet-induced obesity (press release).
In humans the main cause of elevated insulin is eating too much junk carbohydrates. So it’s no coincidence that low carb diets consistently outperform other diets for weight loss.
It’s the insulin, stupid.
Earlier: The #1 Cause of Obesity: Insulin