Herbal Interventions for the Management of Prehypertension: A Systematic Review of Clinical Evidence

Abstract

Introduction: Prehypertension is a precursor to clinical hypertension and increases cardiovascular risk. Lifestyle modification is the primary treatment, and herbal remedies may offer a complementary approach. This review assesses the evidence for herbal interventions in this specific population.

Methods: A search of MEDLINE and Embase was conducted for RCTs evaluating herbal medicines in individuals diagnosed with prehypertension (SBP 120-139 mmHg or DBP 80-89 mmHg). The primary outcome was the change in blood pressure.

Results: The review included 10 RCTs. The strongest evidence was found for hibiscus tea and aged garlic extract, both of which significantly lowered blood pressure to normotensive levels in a substantial portion of participants. Evidence for other herbs like grape seed extract was less consistent.

Discussion: Certain herbal interventions can be effective in managing prehypertension, potentially delaying or preventing the progression to established hypertension. They represent a viable option to augment lifestyle changes.

Conclusion: Hibiscus tea and aged garlic extract are effective, evidence-based options for managing prehypertension.