Dietary Supplements With Evidence for Blood Pressure Reduction
Some dietary supplements have demonstrated small-to-moderate blood pressure (BP) reductions in clinical trials. Use of supplements for BP lowering is not a substitute for prescription antihypertensive therapy, and risks of supplement-drug interactions require clinician oversight [1].
Hibiscus sabdariffa (hibiscus tea / roselle)
Hibiscus sabdariffa has demonstrated BP-lowering effects in randomized trials and meta-analyses. Pooled estimates from a systematic review and meta-analysis of randomized controlled trials showed a weighted mean difference of −7.58 mmHg for systolic BP and −3.53 mmHg for diastolic BP [2].
Beetroot (nitrate-rich beetroot juice)
Nitrate-rich beetroot products have demonstrated BP-lowering effects in patients with arterial hypertension. A 2022 systematic review and meta-analysis reported that nitrate derived from beetroot juice reduced systolic BP (clinic and ambulatory values combined) by a mean difference of −4.95 mmHg and reduced diastolic BP (clinic and ambulatory values combined) by a mean difference of −0.90 mmHg [3].
Coenzyme Q10 (CoQ10)
CoQ10 has not shown consistent BP benefit across studies. A Cochrane evidence summary (2 small trials) reported no evidence of effect on diastolic BP when trials were pooled (mean difference −1.62 mmHg; 95% CI −5.2 to 1.96) [4].
Selection Considerations for Supplement Use
Supplement choice should reflect evidence quality, expected magnitude of BP effect, and safety considerations. CoQ10 evidence for BP lowering is limited by small trials and inconsistent findings [4].
Initiation Thresholds and Integration With Hypertension Management
Supplement use does not replace antihypertensive medication when BP is above guideline-based treatment thresholds. Management decisions should incorporate clinician evaluation of BP level, cardiovascular/renal risk, and treatment goals, with additional counseling for supplement use [1].
Common Pitfalls to Avoid
Unsupervised supplement use can create harm through supplement-medication interactions and delayed initiation of effective therapy. The American Heart Association advises discussing any over-the-counter supplement that claims to lower BP with a health care professional [1].
Targets of Therapy for Blood Pressure Control
The primary therapeutic goal remains achieving guideline-based BP control using evidence-based therapy rather than supplements alone. Clinical BP targets should be individualized based on patient risk profile and tolerability of therapy under clinician management [1].
Practical Evidence Summary by Supplement
Hibiscus sabdariffa has evidence for BP reduction with pooled estimates of −7.58 mmHg systolic and −3.53 mmHg diastolic in a meta-analysis of randomized controlled trials [2].
Nitrate-rich beetroot juice has evidence for BP reduction in arterial hypertension with a pooled mean difference of −4.95 mmHg systolic and −0.90 mmHg diastolic (clinic and ambulatory combined) [3].
CoQ10 has inconsistent evidence for BP lowering, with pooled diastolic effect not supporting a clear benefit and small trials showing heterogeneous or null findings [4].