As noted above, most of the work that passes for science (I'd say 'science' except that over-quote-marking has come into question recently on LTH)on this sort of topic, is, at best, bad science. The finest critique ever done remains Feinstein's, which I quote:
Science, Vol 242, Issue 4883, 1257-1263
Copyright © 1988 by American Association for the Advancement of Science
ARTICLES
Scientific standards in epidemiologic studies of the menace of daily life
AR Feinstein
Clinical Epidemiology Unit, Yale University School of Medicine, New Haven, CT 06510.
Many substances used in daily life, such as coffee, alcohol, and pharmaceutical treatment for hypertension, have been accused of "menace" in causing cancer or other major diseases. Although some of the accusations have subsequently been refuted or withdrawn, they have usually been based on statistical associations in epidemiologic studies that could not be done with the customary experimental methods of science. With these epidemiologic methods, however, the fundamental scientific standards used to specify hypotheses and groups, get high-quality data, analyze attributable actions, and avoid detection bias may also be omitted. Despite peer-review approval, the current methods need substantial improvement to produce trustworthy scientific evidence.
Geo
Sooo, you like wine and are looking for something good to read? Maybe
*this* will do the trick!
