WholefoodsPlantbased

Hello everyone, I was wondering if metabolic damage real. It is a topic heavily discussed in the high-carb vegan community. Metabolic damage is the damage caused by long term calorie restriction, either through dieting or eating disorders. People who have a history of calorie restriction gain back the weight they've lost and sometimes even more. It is hard for them to get to a healthy weight. They even gain weight while eating a plant-based diet. The first time I heard about this was from a YouTuber named freelee the banana girl. She had recovered from an eating disorder and discovered veganism. At first she gained a lot of weight, but she gradually began to lose after her "metabolism recovered".  Is there any research proven that metabolism can be damaged and then repaired by eating high nutrient foods?