I have no problem with a post workout shake of WMS, maltodextrin, and/or dextrose. However if I add even 15-20g of whey protein I get a gut ache and usually in the bathroom within 20 minutes. I've tried various protein powders
1. Is this common?
2. Do I have to have protein immediately PWO or should I take a pure carb (maybe some BCAA) post workout and protein maybe 30-45 minutes later?