Acne are not itchy or only mildly itchy and they look like red bumps with or without white centers. The bumps are quite separated from each other. What did you start to eat after going gluten-free? More fruits and sugary foods? This can trigger acne. http://www.ehealthstar.com/conditions/acne-vulgaris
Dermatitis herpetiformis can be very itchy and the bumps are more close together and they tend to crust over.
Hmm... I have had Evolution three days in a row. Twice the Orang juice and Once the Pinapple-Mango combo. All three times I had small* bout of intolerance flaring up.
Note: I did not try their green veggie products which contain "wheatgrass".
*reaction lasted about 45-90 minutes each time.