I was just wondering because I think I'm having an allergic reaction to the overexposure to leucine in it. I looked up allergy to Leucine and it said skin hives, which I have, but there is leucine in the whey protein I've been taking for years and I've never had a problem. I took it for two days without any problems but now I'm worried.
Did you search for allergies to other amino acids that also show up as skin hives? Try reducing your intake and see what happens, either do that or stop the intake right now. You do not want your situation to get worse, health always first!