Regulating Melatonin and Cortisol: Effects of Nabhi Therapy on Sleep and Stress Hormones

Abstract

The navel (Nabhi), revered as a central point of life force and energy (Prana), has been historically employed as a therapeutic site for promoting balance across multiple physiological systems. Nabhi oil therapy, an ancient technique involving the application of herbal oils to the navel is gaining renewed attention in the field of integrative and mind-body medicine. This paper explores the scientific underpinnings and clinical potential of Nabhi therapy in modulating two of the body’s most critical circadian hormones: melatonin, which governs sleep-wake cycles, and cortisol, which regulates stress response via the hypothalamic-pituitary-adrenal (HPA) axis. The modern epidemic of chronic stress, insomnia, and anxiety has underscored the need for holistic interventions that can influence neuroendocrine regulation without the side effects of pharmacological agents. The Nabhi region is richly innervated and vascularized, forming a crucial part of the gut-brain axis and autonomic nervous system through its proximity to the vagus nerve. The hypothesis of this paper is that Nabhi oil therapy can serve as a transdermal neuromodulatory intervention, facilitating vagal stimulation and systemic absorption of bioactive herbal constituents, thereby impacting the secretion patterns of melatonin and cortisol. Drawing upon Ayurvedic literature, neuroendocrinology, and emerging clinical data, the study investigates how Nabhi affects circadian hormone regulation. A comparative analysis of serum melatonin levels, salivary cortisol rhythms, sleep quality indices (using PSQI and actigraphy), and perceived stress scales (PSS) in individuals undergoing Nabhi therapy versus control groups is reviewed. The results demonstrate a significant improvement in both hormonal balance and subjective wellbeing in the Nabhi group, with enhanced sleep onset, reduced sleep latency, more consistent melatonin secretion patterns, and attenuated diurnal cortisol peaks, particularly the early morning spike associated with chronic stress. In addition to proposing a physiological explanation via vagal nerve activation and hypothalamic modulation, the paper also evaluates the role of transdermal absorption of herbal actives such as Ashwagandha (Withania somnifera Linn), Jatamansi (Nardostachys jatamansi D.Don.), and Tagar (Valeriana wallichii DC.) all known for their adaptogenic and neuro-calming properties. The findings support the therapeutic use of Nabhi therapy as a non-invasive, culturally rooted, and scientifically plausible modality for the regulation of stress and sleep-related disorders. The paper concludes by highlighting the clinical potential of Nabhi therapy in modern healthcare frameworks, especially in populations resistant to pharmacological interventions or seeking preventive wellness practices. Recommendations for further longitudinal and mechanistic studies are proposed to deepen understanding and standardize applications for broader medical acceptance.