... far, three studies have been done, of which two were small, did not have a placebo group, were not randomized, ... -controlled trial, which found statistically significant results despite its small sample size of 42 patients. Dosages were 150 to 300 ... clinical trials of CoQ10 for hypertension, a research group led by Professor Frank Rosenfeldt (Director, Cardiac Surgical Research Unit, Alfred Hospital, ...