Probably because it made the subjects want to eat more. There's no magic bullet for gaining or losing weight, you either eat more or less that your body needs.
Controlling calorie intake is hardly a magic bullet. That's like saying exercise is the magic bullet for gaining muscle or studying is a magic bullet for passing exams.
A magic bullet in this case would be something that allowed weight reduction with no restriction of calories. From experience, restricting calories long-term is very difficult.
Interesting. Being satiated after a meal is really a marker for obesity - if you eat less to get to your satiation point vs. someone else who has to eat more to get there, you're less likely to put on the pounds. I wonder if this pathogen messes with that sense of being satiated.
