Abdelmonem M, Ebada MA, Diab S, Ahmed MM, et al. Efficacy of Hibiscus Sabdariffa on Reducing Blood Pressure in Patients with Mild
to Moderate Hypertension: A Systematic Review and Meta-Analysis of published
randomized controlled trials. J Cardiovasc Pharmacol 2021 Oct 20. pii: 00005344-900000000-98127.
PMID: 34694241