If I remember correctly, what Able usually states about meat is that all animal proteins leads to ammonia production during digestion. Candida produces ammonia too, and usually the Candida will produce only substances that help it survive. This leads to the conclusion that ammonia is beneficial for the fungus, and therefore eating too much animal protein should be avoided. Beef and pork contain more protein than chicken and fish (I believe). Maybe there was more to it, I don’t remember.