My daughter has been on Tyrex for her entire life. We have been unable to find another product that she likes. This has caused a great emotional toll on her. Every time we try a different product she just sobs. This is a deep down cry coming from her heart and soul. Her life is hard with a metabolic disorder and this was something that was easy for 12+ years. It was consistent and comforting. This has shaken us and reminds of us the many challenges these kids face.