Nature’s Reset: Light, Sound, & Mushrooms Challenge Alzheimer’s Inevitability
Updated
Watching a loved one suffer from Alzheimer’s disease is a fate so heartbreaking that it is impossible to adequately express. For decades, the standard method of care has been to oversee cognitive decline while bracing for the inevitable. The disease is widely regarded as a one-way door, and the drugs to slow it down are underwhelming. But now, in a remarkable convergence of exciting research happening in tandem across labs, clinical settings, and one of the most quantified self-experiments ever conducted, that assumption is now being challenged. And not by a pharmaceutical company, but by some of the oldest tools on earth, light, sound, and mushrooms.
To explore this fascinating research, it is important to highlight what a team at MIT recently discovered about the brain’s built-in cleaning system. Called the glymphatic system, it has its own waste-removal network, akin to a biological pressure washer. Meaning that cerebrospinal fluid moves through a web of channels surrounding blood vessels, flushing out toxic proteins, including the amyloid plaques that are shown to build up in the case of Alzheimer’s disease. As we age, our glymphatic system slows down, especially in Alzheimer’s disease, and the fluid stops moving. The result is the accumulation of waste, which negatively impacts the brain.
In March 2024, Nature published a groundbreaking study led by Dr. Li-Huei Tsai, who, along with his research team, made an extraordinary discovery. They documented that when mice with Alzheimer’s-like pathology were exposed to light and sound flickering at precisely 40 HZ—the frequency of gamma brain waves—for just one hour, the glymphatic system got to work, and amyloid plaques were measurably reduced. In addition to observing this effect, the researchers traced the entire chain of events that led to it. Wow!
So what happened? The 40 HZ stimulation from the light and sound drove gamma oscillations in the brain. To explain further, gamma oscillations are high-frequency brain waves (approx. 30-100 Hz, often around 40 Hz) that serve as a rapid synchronization system for neurons. In other words, they serve as the brain’s “high-speed communication network,” impacting attention, working memory, learning, and conscious thought. Human cognition is better when gamma activity is strong and well-organized, whereas weak or disrupted gamma rhythms are linked to conditions such as Alzheimer’s disease.
Tsai’s research found that gamma oscillations activated a specific class of neurons, VIP interneurons, which then released neuropeptides into the surrounding tissue. These neuropeptides caused the brain’s arteries to pulse more forcefully, which, in turn, pumped cerebrospinal fluid through the glymphatic channels. That fluid then carried amyloid out of the brain and into the lymph nodes in the neck, where it was cleared from the body. Yes, this was caused by one hour of flickering light and sound, resulting in a cascade that ended with the brain washing itself clean.
Sound and light flickering at 40 Hz is not a drug, and it has none of the damaging side effects associated with drugs. Even better, it costs nothing and works with a mechanism that the brain already has in place. And Tsai and his team confirmed that blocking any step in the chain of events mentioned above (the arterial pulsation, the water channels that facilitate fluid exchange, and the VIP neurons themselves) shut down the entire process, indicating that the causality is airtight. Nature is amazing, and now let’s add psilocybin to the picture.
Subsequently, an eye-opening case report published on May 27, 2026, in Frontiers in Neuroscience documented a scenario in which Alzheimer’s medicine has no framework. An elderly woman with a 10-year history of Alzheimer’s disease, with five years of near-complete communication loss, severe cognitive decline, and dependent mobility, received a single high dose of psilocybin-containing mushrooms. What happened next shocked everyone. She experienced a transient but unmistakable multidomain improvement in her state of mind. Her communication returned, and functions that had been lost for years briefly returned. The authors of the study noted the transience and limitations of a single case report, adding that advanced Alzheimer’s is generally regarded as a stage of irreversible decline. Undoubtedly, the patient’s unexpected response did not fit that model.
And the evidence keeps coming from other sources. A different study published late last year in Alzheimer’s & Dementia documented that psilocybin reduced neuroinflammation and improved hippocampal neurogenesis in Alzheimer’s disease model mice. This finding matters because these are two of the core drivers of cognitive decline. For its part, Johns Hopkins is conducting a clinical trial that is exploring the use of psilocybin for depression in people with mild cognitive impairment and early Alzheimer’s. Likewise, UCSF currently has active psilocybin trials examining its effects on neuroinflammation biomarkers in older adults with Alzheimer’s disease. Indeed, the research is moving fast, suggesting that psilocybin affects the brain in ways that most existing treatments do not.
And let’s not forget longevity researcher and technology entrepreneur Bryan Johnson. In what could be the most quantified psychedelic experiment ever conducted, Johnson has documented two psilocybin doses along with extensive biological monitoring, including the tracking of glucose, inflammation, cortisol, hormones, and brain connectivity simultaneously. The results of his experiment simultaneously crossed multiple systems in ways that years of other research had failed to do. Johnson’s research, findings, and commentary are linked here and worth reading.
Together, these findings strongly indicate that the brain fights back when it has something intrinsically healing to work with. Whether it is light and sound at God-given frequencies, or fungi, neither of these comes with a patent, nor do they require a prescription. And they certainly don’t fit the model that says Alzheimer’s is a one-way door. Indeed, Tsai’s research demonstrated that, under the right circumstances, the brain can wash itself clean. Likewise, a mushroom compound was able to reset systems that nothing else could touch, and a woman who had been silent for years spoke again. We have not yet cured Alzheimer’s disease. But these amazing feats are reminders that nature got here first — and that decades have been spent looking for answers in the wrong places. We have run out of excuses to keep pretending the answers we seek aren’t already here.