There is no clear evidence in supporting emotional healing practice in integrative oncology. Some studies show better quality of life when patients underwent psychological interventions, but not necessarily longer survival rate. A study done with 227 breast cancer patients shows that distress reduction through psychological intervention not only improves quality of life but also overall health. However, patients of this study also underwent diet change, exercises, and psychological intervention.

Clinical trials using Emotional Freedom Techniques for cancer patients have just started to be conducted.