Not a disease, but the substrate every disease grows in. Your telomeres shorten, your senescent cells accumulate, your mitochondria slow down. Everything else follows.
Medicine doesn't treat aging — it treats the consequences. Statins for cholesterol, metformin for blood sugar, bisphosphonates for bone density, each one a finger in the dike. Hormone replacement helps some systems but remains controversial. Senolytics are in clinical trials but years from standard practice. The anti-aging industry sells supplements and protocols with thin evidence. The fundamental mechanisms — telomere attrition, mitochondrial dysfunction, chronic inflammation, stem cell exhaustion — go largely unaddressed by conventional care.
Hachmo et al. (2020) published a landmark study in Aging showing that HBOT at 2.0 ATA with intermittent oxygen exposure lengthened telomeres by 20–38% and decreased senescent cell populations by up to 37% in aging adults. This was the first intervention in humans shown to reverse these two hallmarks of aging at the cellular level. The protocol used air breaks to create a relative hypoxic stimulus.1
Efrati et al. (2020) demonstrated in Aging that a 60-session HBOT protocol improved cerebral blood flow and cognitive function in healthy adults over 64. SPECT imaging confirmed increased perfusion in regions that typically decline with age. Memory, attention, and processing speed all improved significantly.2
Hadanny et al. (2022) published in Aging a comprehensive analysis showing that HBOT modulated over 1,000 genes related to aging, including pathways involved in inflammation, apoptosis, and cellular senescence. The transcriptomic changes were consistent with biological age reversal, not just symptom management.3
Begum et al. (2022) published in Scientific Reports a study showing that 670 nm red light exposure improved mitochondrial membrane potential and ATP production in aging retinal cells, reversing age-related decline in mitochondrial function. The effect was strongest in subjects over 40, precisely the population with the greatest mitochondrial decline.4
Hamblin (2018) reviewed the evidence in BBA Clinical that photobiomodulation at near-infrared wavelengths activates mitochondrial cytochrome c oxidase, increases ATP synthesis, and reduces reactive oxygen species — directly counteracting three of the nine hallmarks of aging. The effect is systemic when applied to large tissue areas.5
Johnstone et al. (2016) demonstrated in Frontiers in Neuroscience that transcranial near-infrared light reduced neuroinflammation and improved motor and cognitive function in aged animal models, with histological evidence of reduced oxidative damage and preserved neuronal integrity.6