Alzheimer's disease, endometrial and breast cancer; fewer side effects; and custom blending to uniquely address individuals. There is no credible evidence to support these claims. Bioidentical hormones and compounded BHT are expected to have the same risks and benefits as CHRT; the latter benefits from years of study and regulation, while compounded BHT has no scientific data to support claims of superior safety or efficacy. The following specific claims have been made for the efficacy of bioidentical hormones and compounded BHT, with varying evidence to support or contradict them: In 2006, Somers released the book Ageless: The Naked Truth About Bioidentical Hormones endorsing the use of bioidentical hormones. The book was criticized by a group of doctors who (though generally supportive of BHT) state that more research is required, and object to protocols mentioned in the book—because of their potential danger and the promoters' lack of qualifications. Somers' book may have increased awareness of the existence of BHT for a growing number of menopausal women, but also may have caused confusion by making unsubstantiated claims for BHT and referring to bioidentical hormones as non-drug products with fewer risks. Bioidentical hormones have also been discussed on The Oprah Winfrey Show, with Somers as a guest. Michael Cirigliano and Judi Chervenak have stated in reviews of the literature on BHT that large-scale, peer-reviewed studies should be used to establish the safety, efficacy and beliefs about the use of bioidentical hormones. Two 2008 studies conducted in France found that estradiol plus micronized progesterone did not increase the incidence of breast cancer, while a comparison of estradiol plus different types of progestins found a reduced risk of invasive breast cancer with micronized progesterone. Christine Derzko stated that the evidence supported the use of bioidentical estrogen plus progesterone, but since the trial was an observational cohort study rather than a randomized controlled trial that compared different types of hormones head-to-head, more data was required before concluding bioidentical hormones were safer and preferred. Derzko concluded that there was weak (but promising) preliminary evidence that bioidentical hormones may present equal (or possibly lower) risks than conventional HRT; however, there was no data supporting the use of compounding. Derzko recommended following evidence-based medicine and cited concerns over BHT by numerous medical organizations—requirements for oversight over compounding, black box warnings for all bioidentical products, and the establishment of mandatory adverse-events registry. M. Sarah Rosenthal, Director of the University of