Weight loss and Alzheimer's

As most Caregivers who are caring for loved ones with Alzheimer's we see how they lose weight as the disease progress. My Mom has gone down to almost 100lbs so we started a protein powder that is sugar free and suppose to help her gain weight. We have been doing it for about one month and we saw a family friend, Jose, two weekends ago and the first thing out of his mouth was "Mom is gaining weight". I felt as if I just won the lottery, it felt so good that someone noticed, since I'm with her everyday I don't really see it. I mix the powder with fruit and juice and make her a smoothie and she loves it.