Hibiscus sabdariffa L. tea (tisane) lowers blood pressure in prehypertensive and mildly hypertensive adults.
J Nutr. 2010 Feb;140(2):298-303. doi: 10.3945/jn.109.115097. Epub 2009 Dec 16.
J Nutr. 2010.
PMID: 20018807
Clinical Trial.