I believe that your “zits” are the start of hives caused by an allergic reaction. I would suggest that when you take P & B shakes that you also do some type of bowel management such as taking laxative, enemas or get some colonics.
I use to get hives whenever I ate spinach and it always started with “zits” having a clear center, a very small bubble and grew to a large red “itching” welt. I am very thankful this phase of my life has left me. Hives is very uncomfortable and causes extreme tiredness.