Regular Raw Beetroot Consumption and Apparent Preservation of Postmenopausal Vaginal Tissue - A Translational Analysis of the Nitrate–Nitrite–Nitric Oxide Pathway

Abstract Background Genitourinary syndrome of menopause (GSM) is associated with postmenopausal changes in vaginal epithelial integrity, elasticity, lubrication, vascular function, and tissue architecture resulting primarily from declining sex-steroid signalling. However, the extent of these changes varies substantially among postmenopausal women. Dietary beetroot is naturally rich in inorganic nitrate, which can be converted through the enterosalivary nitrate–nitrite–nitric oxide (NO) pathway to bioactive NO, a central regulator of vascular tone, endothelial function, and tissue perfusion. [1] Objective This study evaluated the relationship between regular consumption of blended whole raw beetroot and preservation of vaginal tissue characteristics in postmenopausal women and examined the nitrate–nitrite–NO pathway as a potential physiological mechanism underlying the observed tissue phenotype. [2] [3] Methods Postmenopausal women regularly consumed approximately 4–5 tablespoons of blended whole raw beetroot per day. Vaginal tissue characteristics were assessed with particular attention to postmenopausal anatomical and mucosal changes, including apparent tissue thinning, loss of elasticity, reduced vascularity, and other features associated with GSM. The biological interpretation of the findings was integrated with established evidence concerning dietary nitrate metabolism, NO-dependent endothelial function, microvascular perfusion, and female genital vascular physiology. [4] [5] Results Regular raw beetroot consumption was associated with apparent preservation of vaginal tissue characteristics despite postmenopausal status. The observed tissue phenotype was characterized by reduced apparent atrophic change relative to the anatomical deterioration typically associated with GSM. A biologically plausible mechanism involves the high inorganic nitrate content of beetroot and its conversion to nitrite and subsequently NO. Increased NO bioavailability may support endothelial function, vasodilation, microvascular blood flow, tissue oxygenation, and maintenance of local vascular homeostasis. This interpretation is consistent with evidence demonstrating that nitrate-rich beetroot supplementation can improve endothelial and microvascular function in postmenopausal women and with established NO-dependent regulation of female genital blood flow. [6] The findings therefore identify systemic nitrate–NO signalling and genital microvascular perfusion as candidate physiological mediators linking regular beetroot consumption with preservation of postmenopausal vaginal tissue characteristics. Conclusions Regular consumption of blended whole raw beetroot was associated with apparent preservation of vaginal tissue characteristics in postmenopausal women. The nitrate–nitrite–NO pathway provides a physiologically plausible mechanism through which beetroot-derived nitrate could enhance vascular and microvascular function and thereby contribute to maintenance of genital tissue perfusion and integrity. These findings establish a potential nutritional–vascular relationship between dietary nitrate exposure and postmenopausal vaginal tissue physiology and provide a foundation for controlled studies incorporating quantitative nitrate exposure, standardized GSM assessments, genital perfusion measurements, hormonal status, and objective histological or cytological endpoints. Clinical trial registration This study was registered under the oversight of the Republic of Türkiye Ministry of Health, within the WHO European Region (WHO European Health Cities Network) within (Clinical Trials Information System (CTIS)), The dietary beetroot intervention and nitratenitric oxide assessment framework used in the present study was informed, adapted and included in the protocol represented by ISRCTN86706442 in 2017, with modifications for the present postmenopausal population, sixmonth intervention period, and vaginal tissue outcomes.