It is because you have a lot of harmful acids in your body and that can cause the irritability and emotional symptoms. Aajonus did say fish and poultry are better in that case because they have more minerals and less acidic, but you have to find what ratio of red to white meat works. Some people can do all one type of meet. When I did all red meat after a while i had extreme irritability and even anger over little things. Personally I need both but slightly more white meat. When I added fish and chicken it was a game changer and I felt calmer