Can Hyperbaric Oxygen Help Alzheimer’s & Brain Injury? Drs. Paul Harch & Josh Helman #HBOT

Dr. Paul G. Harch, a veteran emergency and hyperbaric medicine physician with 40 years of experience, challenges the long-standing misconception that hyperbaric oxygen therapy (HBOT) is only for divers or carbon monoxide poisoning. Instead, he argues that HBOT is a pressure- and oxygen-dose-dependent therapy with profound effects on brain function, capable of reversing neurological decline in conditions like Alzheimer’s, traumatic brain injury, and dementia pugilistica. His groundbreaking work began with treating divers suffering from decompression sickness, where he discovered that delayed treatment and neurological symptoms were due to ischemic tissue damage—not just bubbles—and that lower-pressure, lower-oxygen protocols could yield dramatic cognitive improvements. Using advanced quantitative EEG and SPECT/PET imaging, he found that individualized dosing—often below the standard 2 atmospheres—was critical, with one Alzheimer’s patient showing the most significant metabolic improvement ever recorded on PET scan. He emphasizes that HBOT treats underlying pathophysiology, not just disease labels, and that its efficacy hinges on precise dosing, which explains why many clinical trials fail: they use one-size-fits-all protocols. Despite skepticism from mainstream medicine—where HBOT was once dismissed as 'snake oil'—Harch believes the field is finally gaining scientific credibility, with future research focused on expanding reimbursement and validating multimodal, physiology-driven treatment strategies. The episode reveals that HBOT’s power lies not just in oxygen delivery, but in barometric pressure itself, which independently alters gene expression and blood flow. Harch’s approach uses real-time EEG to personalize treatment, avoiding the 'oxygen toxicity' that can derail progress. He warns against unregulated clinics and champions finding practitioners who treat HBOT as a living, adaptive therapy—not a rigid protocol. For patients, the takeaway is clear: HBOT isn’t a magic bullet, but a promising, science-backed tool for brain repair—when dosed correctly. The future, he insists, is not in dismissing HBOT, but in understanding it as a two-component therapy (pressure + oxygen) with broad applications in neurodegeneration.