Hyperbaric oxygen activates the nitric oxide pathway. Here's how — and how we measure it.
A scientific framing of the HBOT + nitric oxide mechanism — written for clinicians, researchers, and referring practitioners. Built on the published work of Thom, Boykin, Bryan, and colleagues. This page is a living document. Citations are not exhaustive; it reflects the current operating model behind our protocols and the salivary NOx biomarker on our measurement stack.
The mechanism · four pillars
HBOT does not deliver nitric oxide. It activates the endogenous pathway that produces it. The clinical effects of HBOT — accelerated wound healing, angiogenesis, stem-cell mobilization, post-surgical recovery — share an upstream signaling node: nitric oxide.
Hyperbaric oxygen exposure increases endothelial nitric oxide synthase (eNOS) expression and activity in vascular endothelium — the source of physiological NO signaling that governs vasodilation, perfusion, and endothelial repair.
In wound healing models, HBOT measurably increases nitric oxide metabolites (NOx) at the wound bed — the biochemical signature underlying the clinical observation that HBOT accelerates closure and reduces complication rates.
The angiogenic growth factors VEGF and bFGF — which drive new capillary formation in regenerating tissue — are upregulated downstream of NO signaling during and after HBOT exposure.
Thom and colleagues demonstrated that HBOT mobilizes bone-marrow stem cells in an NO-dependent manner. Block NO production and the stem-cell effect of HBOT is attenuated.
Salivary NOx — the trackable readout
Salivary nitric oxide metabolites (NOx) provide a non-invasive, repeatable measurement of endogenous NO pathway activity. We capture it at baseline, midpoint, and completion on NO-pathway protocols — alongside HRV, SpO₂, and (where indicated) NeuralChek and WaviMed.
See the full measurement stackWhy N1O1 is included in every protocol
N1O1 nitric oxide lozenges — developed by Dr. Nathan Bryan — support the same endogenous NO pathway HBOT activates, through oral nitrate-to-nitrite-to-NO conversion. Including N1O1 in protocol courses is a deliberate clinical decision: HBOT activates the upstream signaling; N1O1 keeps substrate available across the rest of the day, when the patient is outside the chamber.
N1O1 is provided as an adjunct, not a substitute for HBOT. Dosing, suitability, and any medication interactions are reviewed during your consultation.
Key references
A starting set, not an exhaustive bibliography. We're committed to citing the null findings alongside the positive — if a published trial does not support an HBOT + NO claim, it appears here too. If you're a researcher and want to recommend a reference (positive or null) for inclusion, write to research@reenergized.com.
Landmark paper demonstrating HBOT-induced bone marrow stem cell mobilization and the requirement for nitric oxide signaling.
Comprehensive mechanism review including the role of nitric oxide and reactive nitrogen species in HBOT-mediated healing.
Direct measurement of elevated NOx in wound beds during HBOT — central reference for the NO-mediated wound healing model.
Authoritative reference on the dietary nitrate → nitrite → NO pathway and the endothelial NO biology underpinning N1O1.
This page is the scientific framing for our HBOT + NO work. It is not medical advice. Off-label HBOT indications require physician consultation; see our screening pathways.
NeuralChek · WaviMed · SpO₂ · HRV · salivary NOx — the instruments behind every protocol.
Where the NO mechanism plugs into Restorer, 40-Hour, and the Telomere Protocol™.
How we screen for HBOT before any first session — including NO-pathway considerations.