Loj advocates primo for cutting as he said it destroyed his appetite. Other too report a significant loss in appetite. I personally wouldn't use it unless you got money to blow as there are other way to decrease appetite for a lot cheaper. Mr big hit it on the head. Tren will help you retain muscle in a caloric deficit. Think of why it was designed : to help cattle retain their muscle during transport as they won't be getting fed too often. Works the same in people.