NEW ORLEANS — Quaffing three cups of hibiscus tea daily for 6 weeks resulted in a mean 7.2-mm Hg reduction in systolic blood pressure in mildly hypertensive or prehypertensive adults in a randomized, double-blind placebo-controlled trial. “This suggests that regularly incorporating hibiscus tea into the diet may help control blood pressure in people at risk of developing hypertension,” Diane L. McKay, Ph.D., said at the annual scientific sessions of the American Heart Association. The public health implications of a blood pressure reduction of this magnitude, if extended to a large population, could be profound. According to the National High Blood...