Imagine a world where athletes could safeguard their brains from the invisible damage caused by repeated impacts. It sounds like science fiction, but a groundbreaking study suggests that red light therapy might be the key to preventing long-term brain injuries—a game-changer for sports safety. But here's where it gets controversial: can shining light through the skull really protect the brain from inflammation and potential conditions like chronic traumatic encephalopathy (CTE)? Let’s dive in.
For decades, we’ve known that repeated head impacts—whether from boxing, football, or other contact sports—can lead to devastating brain conditions. Terms like punch-drunk syndrome and boxer’s madness have evolved into the more clinical CTE, but the core issue remains: these impacts can cause confusion, memory loss, and even dementia. Over 100 former NFL players have been posthumously diagnosed with CTE, highlighting the urgent need for solutions. Yet, current treatments often focus on managing symptoms like headaches and balance issues rather than addressing the root cause.
Enter red light therapy, an unconventional approach that uses near-infrared light to penetrate the skull and target the brain. This therapy aims to reduce inflammation caused by repetitive impacts—a key driver of brain damage. A preliminary study involving 26 collegiate football players found that those who received red light therapy showed no increase in brain inflammation over a 16-week season, while the placebo group did. And this is the part most people miss: the results were so striking that even the researchers were initially skeptical. Published in the Journal of Neurotrauma, the study suggests that red light therapy could be a preventive measure against brain damage before symptoms even appear.
Here’s how it worked: Players used a light-emitting headset and a nasal device three times a week for 20-minute sessions. MRI scans revealed that the placebo group experienced increased inflammation by the season’s end, while the red light group remained stable. Hannah Lindsey, PhD, the study’s lead author, described the findings as “striking”—a testament to the therapy’s potential.
But how does it work? Red light therapy’s mechanism is rooted in its ability to reduce inflammation-causing molecules in the brain. While only a fraction of the light reaches the brain, studies on human cells and animal models have shown that specific wavelengths can mitigate inflammation. However, the research is still in its early stages, and larger clinical trials are needed to confirm these findings.
Here’s the controversial part: Some experts remain skeptical, questioning whether light can truly penetrate the skull effectively or if the results are due to chance. The study’s small sample size and initial differences in inflammation levels between groups have raised eyebrows. Yet, researchers like Elisabeth Wilde, PhD, who initially doubted the therapy, are now convinced by consistent results across multiple studies. A Department of Defense-funded trial involving 300 participants is set to begin in 2026, focusing on first responders, veterans, and active-duty service members with traumatic brain injuries (TBIs).
If successful, red light therapy could revolutionize brain health across sports and beyond. Carrie Esopenko, PhD, hopes it will make sports safer for everyone, from kids to professionals. But we want to hear from you: Do you think red light therapy could be the future of brain protection, or is it too good to be true? Share your thoughts in the comments below!
The study, titled “Transcranial Photobiomodulation Promotes Neurological Resilience in Current Collegiate American Football Players Exposed to Repetitive Head Acceleration Events,” was supported by grants from Brigham Young University and its affiliates. Disclosure: Lawrence Carr, PhD, a consultant for Vielight, Inc., which manufactures the devices used in the study, was involved in the research.
