Ammonia is created by the breaking down of proteins in meat, especially beef.
There are no ammonia levels in beef to begin with, because it’s a by-product.
Regardless of the source, beef is going to have ammonia created during digestion.
It can be made easier to digest by tenderising, marinading… but you can’t avoid the ammonia.
That’s why beef is not recommended on stage one of the strict diet.
Able suggests only eating it maybe one to two times a month once your symptoms have been improved after a few months.
Lamb is a better alternative since it is easier to digest, but still produces ammonia upon digestion. It is better overall for your health, but shouldn’t be consumed too often on the diet.