I use isolate, because there is very little lactose in it. Regular whey doesn't work with me. However the body building isolates usually, if not always cause me issue as well, be it the sweeteners or fillers added. So I have a terrible time finding something I can stomach. The last brand I used (for many years) started adding probiotics to it and that threw my gut for a loop... after a gazillion dollars wasted trying new protein powders (and subsequent gut issues) I finally found this stuff at the grocery store of all places. Works like a charm for me and it inexpensive. Double win - https://well.ca/products/kaizen-naturals-whey-isolate-protein_141608.html
PS - If it helps any when I was severely flaring (crohn's-colitis) I used whey isolate. I would make a simple frozen banana, 2 scoops of whey and two handfuls of walnuts and some water into a nutri-bullet type thing for about
~700+ calories. I could handle walnuts this way. I don't think whey isolate/powder on it's own will help much in maintaining weight. You would need a source of fats and carbs mixed in. The liquid calories worked well in my system.
Post Edited (Canada Mark) : 12/27/2018 10:30:53 PM (GMT-7)