Key result
Obesity-oriented VNS represents a diverse family of interventions rather than a single uniform modality.
Why the study?
Obesity-related VNS studies differ in stimulation parameters, animal models, and readouts, making interpretation difficult across non-uniform interventions.
Vagus nerve stimulation for obesity encompasses diverse electrical strategies and physiological targets, requiring a nuanced understanding of its mechanisms rather than viewing it as a uniform intervention.
Should not yet change obesity practice; leaves open the need for human trials of tailored VNS modalities.
Implantable vagus nerve stimulation (VNS) has been explored as a programmable bioelectronic approach for modulating feeding and metabolic function in obesity. However, obesity-related VNS is not a single uniform intervention. Studies differ in stimulation site, electrode interface, waveform, stimulation schedule, stimulation mode, animal model, and physiological readout, making interpretation difficult. This review examines implantable obesity-related VNS from an electrical-targeting perspective. We summarize stimulation-relevant vagal physiology and map major electrical strategies, including cervical VNS, abdominal and subdiaphragmatic activating VNS, high-frequency vagal blockade, and emerging responsive or self-powered interfaces. Reported outcomes are interpreted in relation to satiation, reward-related feeding, glucose handling, nutrient metabolism, energy expenditure, inflammatory regulation, and obesity-associated changes in vagal signaling. Overall, obesity-oriented VNS should be understood as a family of electrical interventions applied to a complex vagal system, rather than as a single therapeutic modality.
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Kim et al. (2026) conducted a review in Obesity. Vagus nerve stimulation (VNS) was evaluated. Obesity-oriented vagus nerve stimulation represents a diverse family of electrical interventions applied to a complex vagal system, rather than a single uniform therapeutic modality.
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