I'm going to weigh in on the carte blanche statements about whey protein. Protein promotes tissue rebuilding and recovery, to some degree, but generally, whey protein does two things that are counter-productive to weight gain. First, the hormone, CCK (cholecystokinin), is increased by whey. It stimulates the production of bile, in preparation of disgestion of fat and protein. CCK is also a hunger suppresing hormone. This means you will have less appetite and more stomach acid. We all know hownthat feels.

Second, whey protein suppresses ghrelin, the actual hunger hormone. Ghrelin is a neuropeptide, which means it is an important part of regulating energy (metabolism). This is one mechanism that can cause a reduced metabolic rate with resulting weight gain.

Whey, for compromised digestive issues we will all experience to some degree, can cause much worse abdominal distress, increased stomach acid two distinctly different ways and cause overall weight loss.

Pre-treatment, whey is an excellent bulking product if you already have muscles. Post-treatment weight gain, as Christine keeps pointing out, is about calories in exceeding calories used. Keep track of calories and increase them until you see weight gain. Eat a healthy, well-balanced meal, too. You will gain health from balanced nutrition.