Why are people how have had substantial, recent weight loss not eligible for the NUTRIMAL project?

Weight loss due to calorie restriction (i.e. a weight loss diet or not eating enough due to a poor appetite) results in the loss of muscle as well as fat. Studies have shown that during calorie restriction the rate of muscle building in response to eating protein is blunted. This means that people who have recently lost weight may respond differently to the NUTRIMAL drinks compared to those who are weight stable.