Energy balance

Long-term caloric restriction (12 months) induces metabolic adaptation (Total Energy Expenditure lower than predicted by body composition changes), regardless of whether the diet is High or Low Glycemic Load.

When you lose weight, your body naturally burns fewer calories than expected for your new size. This 'metabolic adaptation' happens whether you eat high or low glycemic carbs. It is a normal survival mechanism, not a broken metabolism. To counteract it, focus on preserving muscle mass (which LG diets may help with) and maintaining your weight loss, as the adaptation is a risk factor for weight regain.