I know several people on the forum taking digestive enzymes and Peat also wrote that low gastric acid is one of the main signs (and issues) in hypothyroidism. So, before you go and spend money on pepsin capsules and digestive enzymes, you may want to try caffeine with your meals. The study suggests 300mg - 400mg based on what's commonly found in coffee. There are multiple studies showing caffeine does that but I am only posting this one since it was in humans.
http://www.tandfonline.com/doi/abs/10.3 ... 7109180725
"...At a plasma caffeine level of about 20 mg/litre the maximal acid response was obtained which corresponded to 44% of the pentragastrin-stimulated maximal output. Four to five cups of coffee consumed over 4 to 5 hours produced a similar plasma caffeine level. A linear relationship was demonstrated between the plasma caffeine levels and the corresponding gastric acid and pepsin outputs. There was in addition a high correlation between the acid outputs and the corresponding pepsin outputs. It was concluded that both acid and pepsin secretion are stimulated by intravenous caffeine administration, but that acid output is stimulated to a greater degree than pepsin output."
Coffee is highly acidic so I would assume it actually catalyzes ulcers because dont they form as a result of harsh acidity?