Writers such as Carl Sagan, a noted astrophysicist, advocate of scientific skepticism and the author of The Demon-Haunted World: Science as a Candle in the Dark (1996), have lambasted the lack of empirical evidence to support the existence of the putative energy fields on which these therapies are predicated.
Forfattere såsom Carl Sagan, en anerkendt astrofysiker, fortaler for videnskabelig skepticisme og forfatter til The Demon-Haunted World: Science as a Candle in the Dark fra 1996, har stærkt kritiseret manglen på empirisk evidens for de formodede energifelter, der er basis for biofeltterapi.