Today I am a psychotherapist and EFT/Matrix practitioner. I would be the first to advocate the effectiveness of EFT. The tools itself is excellent, but I believe that practitioners that specialize in weight-loss need to have some understanding binge eating disorder. Obviously not everyone that walks into your practice with fall into this category, but still it helps to 'be in the know'.
Persistently eating too much or too little can be symptomatic or indicative of an eating disorder, but what many people don't appreciate is that food is just one factor in an eating disorder. While they're characterised by disordered eating habits, ultimately eating disorders are serious mental health illnesses.