Incidentally, another interesting feature of the HCG method is that it does not ruin a singing voice. The typically obese prima donna usually finds that when she tries to reduce, the timbre of her voice is liable to change, and understandably this terrifies her. Under HCG this does not happen; indeed, in many cases the voice improves and the breathing invariably does. We have had many cases of professional singers very carefully controlled by expert voice teachers, and the maestros have been so enthusiastic that they now frequently send us patients.
Source: Pounds and Inches Manuscript by Dr. Simeons