Original sentence: Although proponents of alternative medicine often cite the large number of studies which have been performed, critics point out that there are no statistics on exactly how many of those studies were controlled, double blind, peer-reviewed experiments, or how many produced results supporting alternative medicine or parts thereof.Some skeptics of alternative practices point out that a person may attribute symptomatic relief to an otherwise ineffective therapy due to the placebo effect, the natural recovery from or the cyclical nature of an illness (the regression fallacy), or the possibility that the person never originally had a true illness.They contend that many forms of alternative medicine are rejected by conventional medicine because the efficacy of the treatments has not been demonstrated through double-blind randomized controlled trials; in contrast, conventional drugs reach the market only after such trials have proved their efficacy.— a valid concern, which CAM proponents point out may also apply in cases where conventional treatments have been used
Edited sentence: Also, some skeptics of alternative practices point out that a person may attribute symptomatic relief to an otherwise ineffective therapy due to the natural recovery from or the cyclical nature of an illness (the regression fallacy), the placebo effect, or the possibility that the person never originally had a true illness.Although proponents of alternative medicine often cite the large number of studies which have been performed, critics point out the fact that there are no statistics on exactly how many of these studies were controlled, double-blind peer-reviewed experiments or how many produced results supporting alternative medicine or parts thereof.One is led to wonder why whole categories of drugs or treatments should be excused from these routine tests.They contend that many forms of alternative medicine are rejected by conventional medicine because the efficacy of the treatments has not been demonstrated through double-blind randomized controlled trials; this is not a moot point, since all conventional drugs reach the market only after such trials have proved their efficacy