Yes, hibiscus does work, although just like with synthetic antihypertensive drugs, its efficacy may vary from person to person. It tastes fruity and sour, quite nice both hot and cold, and is a very popular drink in Egypt and some other countries. Another tasty natural antihypertensive is aronia, a.k.a. chokeberry or “black rowan”. The berries themselves are a bit too tart to eat,...