13/09/2021 Obesity primary cause: not overeating, but "excessive consumption of [processed; ultra processed] foods with a high glycemic load", 

"the carbohydrate-insulin model lays much of the blame for the current obesity epidemic on modern dietary patterns characterized by excessive consumption of foods with a high glycemic load: in particular, processed, rapidly digestible carbohydrates. These foods cause hormonal responses that fundamentally change our metabolism, driving fat storage, weight gain, and obesity.

“Scientists claim that overeating is not the primary cause of obesity” [Science Daily]:

The USDA’s Dietary Guidelines for Americans 2020 — 2025 further tells us that losing weight “requires adults to reduce the number of calories they get from foods and beverages and increase the amount expended through physical activity.”

This approach to weight management is based on the century-old energy balance model which states that weight gain is caused by consuming more energy than we expend….

The authors of “The Carbohydrate-Insulin Model: A Physiological Perspective on the Obesity Pandemic,” a perspective published in The American Journal of Clinical Nutrition, point to fundamental flaws in the energy balance model, arguing that an alternate model,

• the carbohydrate-insulin model,

better explains obesity and weight gain. Moreover, the carbohydrate-insulin model points the way to more effective, long-lasting weight management strategies.

In contrast to the energy balance model, the carbohydrate-insulin model makes a bold claim: overeating isn’t the main cause of obesity. Instead,

 

the carbohydrate-insulin model lays much of the blame for the current obesity epidemic on modern dietary patterns characterized by

excessive consumption of foods with a high glycemic load: in particular, processed, rapidly digestible carbohydrates. These foods cause hormonal responses that fundamentally change our metabolism, driving fat storage, weight gain, and obesity.