This study examined the effect of energy healing on in vitro tumor cell gro
wth using the cell culture model similar to that embraced by oncologists to
assess the effect of chemotherapeutic agents. After selecting an energy he
aler based on his ability to influence this model, we assessed the effects
of energy treatment compared to cells left at ambient temperature and to a
control treatment consisting of a medical student mimicking the healer. A c
hi-square test comparing a medical student's and the practitioner's ability
to inhibit tumor cell growth by 15% associates our practitioner with inhib
ition of tumor cell proliferation (p = 0.02). We also found that the magnit
ude of change was too close to the assay's intrinsic margin of error, thus
making our quantitative data difficult to interpret. Although energy healin
g appears to influence several indices of growth in in vitro tumor cell pro
liferation, these assays are limited in their ability to define and prove t
he existence of this phenomenon. More sensitive biological assays are neede
d for further study in this field.