Why are so many people overweight in developed countries? What is the main cause of weight gain? There are many factors that cause weight gain: genetics, disease, overeating, and a sedentary lifestyle. However, the main cause of weight gain in modern times is the habit of constant eating. Most people eat three meals a day with several snacks in between. Constant feeding causes constantly elevated insulin levels, and insulin is a fat-storage hormone. Here’s how modern eating habits contribute to weight gain.
What Is the Main Cause of Weight Gain?
