Natural Product Mechanisms in Hypertension Treatment

Hypertension remains a leading contributor to cardiovascular morbidity and mortality worldwide, spurring interest in complementary and alternative therapies derived from natural sources. Plant‐ and marine-derived compounds offer multifaceted mechanisms that complement or, in some cases, rival those of conventional drugs. Central pathways include endothelium-dependent vasodilation through enhanced nitric oxide bioavailability, blockade of voltage-dependent calcium channels, modulation of the renin–angiotensin–aldosterone system and diuretic effects. In parallel, many phytochemicals exhibit antioxidant and anti-inflammatory properties that protect vascular endothelium from oxidative stress and chronic injury. Alkaloids, flavonoids, coumarins and peptides have been shown to influence vascular tone by activating endothelial nitric oxide synthase, inhibiting angiotensin-converting enzyme and opening potassium channels in smooth muscle. Marine-derived omega-3 fatty acids and bioactive peptides further extend the repertoire of antihypertensive agents by improving endothelial function and reducing systemic inflammation. Standardised extracts and isolated constituents have demonstrated blood-pressure-lowering effects in preclinical models, and early clinical trials indicate favourable tolerability and acute haemodynamic improvements. As global populations seek affordable and accessible interventions, natural products are poised to play a growing role in integrative management of elevated blood pressure.

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Natural Product Mechanisms in Hypertension Treatment publication trend

The graph below shows the total number of articles in natural product mechanisms in hypertension treatment across all publications each year (not limited to Nature Index journals).

Technical terms

Vasodilation: The widening of blood vessels resulting from relaxation of smooth muscle in the vessel wall, leading to reduced vascular resistance and lower blood pressure.

Endothelium: The single layer of cells lining the interior surface of blood vessels, critical in regulating vascular tone and barrier function.

Nitric oxide synthase (eNOS): An enzyme in endothelial cells that produces nitric oxide, a key vasodilator and signalling molecule in cardiovascular homeostasis.

Renin–angiotensin–aldosterone system (RAAS): A hormonal cascade that regulates blood volume and vascular resistance; overactivation contributes to hypertension.

Oxidative stress: An imbalance between production of reactive oxygen species and antioxidant defences, leading to endothelial dysfunction and vascular damage.

References

1. Effect of fermented garlic extract containing nitric oxide on radial artery pulse waves in hypertension patients: a feasibility observational study. Frontiers in Nutrition (2025).
2. Bioactive molecules from terrestrial and seafood resources in hypertension treatment: focus on molecular mechanisms and targeted therapies. Natural Products and Bioprospecting (2023).
3. Vasorelaxant and Blood Pressure-Lowering Effects of Cnidium monnieri Fruit Ethanol Extract in Sprague Dawley and Spontaneously Hypertensive Rats. International Journal of Molecular Sciences (2024).