Resources:

• Proimmune Glutathione Precursor (Joe Caserino)
• Glutathione First, Dr. Josh Helman’s glutathione resource site
• Emulate Therapeutics, Dr. Xavier A. Figueroa’s biotechnology company

Connect with Dr. Xavier A. Figueroa:

• X (Twitter): @drxfig0708

Connect with Joseph V. Cassarino (ProImmune):

• Website – https://thebestimmunesupport.com
• Use the code DRJOSH to get 10% off

Connect with Dr. Josh Helman, MD:

• Instagram
• LinkedIn
• YouTube
• Substack

READ THE COMPLETE BLOG POST HERE:

Why Glutathione May Be the Missing Piece in Alzheimer’s Prevention

Alzheimer’s disease is often framed as an inevitable consequence of aging or genetics, but in this conversation, Dr. Josh Helman, MD, sits down with Dr. Xavier A. Figueroa to explore a different angle. Dr. Figueroa is a PhD neuroscientist with more than 20 years of experience in basic and neurological clinical research, including Alzheimer’s. At the center of the discussion is glutathione, the body’s dominant intracellular antioxidant, and why supporting it may be one of the most overlooked strategies for protecting the aging brain.

Alzheimer’s Disease Is Mostly Environmental, Not Genetic

Dr. Figueroa explains that only about two percent of Alzheimer’s cases can be traced directly to genetics, meaning the remaining ninety eight percent is shaped by environment and lifestyle. He points to toxicants like aluminum, lead, certain forms of iron, microplastics, and pesticides as key contributors. This reframing matters because it means most people have real opportunities to lower their risk, even after years of toxic exposure, simply by changing what they consume and how they live.

Amyloid Plaques and Tangles Are a Defense Response, Not the Root Cause

For decades, amyloid plaques and neurofibrillary tangles were treated as the primary drivers of Alzheimer’s disease. Dr. Figueroa argues that newer evidence points the other way. Amyloid appears to function as an antioxidant that corrals toxins like aluminum, which is frequently found concentrated inside plaques. Tangles, formed through a process called hyperphosphorylation, appear to be the brain’s attempt to preserve neuron structure under stress. In both cases, the pathology looks less like the disease itself and more like the brain’s defense mechanism reacting to an underlying toxic burden.

Where Aluminum Exposure Comes From, and Why It Builds Over a Lifetime

Aluminum is described as a nearly unavoidable contaminant, present in soil, water, food, and air. While aluminum that is ingested is often excreted, inhaled particulates are more difficult for the body to clear, and exposure accumulates with age. This is one reason Dr. Figueroa sees Alzheimer’s risk rising with age as more of a reflection of cumulative toxic load than a simple marker of the aging process itself.

What Glutathione Actually Does Inside the Cell

Glutathione is a small peptide made of three amino acids, yet it plays an outsized role in cellular survival. It manages oxidative byproducts released during mitochondrial energy production, binds to heavy metals so the body can clear them, and supports immune function. Dr. Figueroa notes that depleting glutathione completely would be fatal within days, underscoring how central this molecule is to basic cell function across nearly every form of life.

Why Oral Glutathione Often Fails and What Works Instead

Because glutathione is a relatively large molecule, oral supplementation often struggles to reach the bloodstream, let alone get inside cells. Liposomal glutathione improves absorption somewhat but can interfere with the body’s own glutathione production cycle over time. Dr. Figueroa describes an alternative approach built on research from Dr. Alton Crum, which uses a specific ratio of amino acid precursors and a selenium cofactor to prompt cells to manufacture their own glutathione internally, rather than trying to deliver the finished molecule from the outside.

Selenium’s Role and Why More Isn’t Better

Selenium is a required cofactor for glutathione peroxidase, one of the key enzymes in the glutathione production cycle, and also assists directly in binding heavy metals for removal. However, Dr. Figueroa is clear that selenium has a narrow therapeutic window. Too little limits glutathione production, but too much becomes toxic. The practical guidance is to favor food sources in modest amounts, such as a couple of Brazil nuts, rather than high dose supplementation.

Black Mold, Mitochondrial Damage, and Why Some Patients Can’t Absorb Supplements

Dr. Helman raises a clinical pattern he sees often: patients with gut damage from mold exposure who cannot absorb glutathione or its precursors regardless of the form used. Dr. Figueroa connects this to mycotoxins that damage mitochondria, increase blood clotting risk, and interfere with the conversion of glutamate to GABA, often leaving patients simultaneously wired and exhausted. For these patients, intravenous delivery may be necessary to bypass a gut that cannot reliably absorb nutrients through normal digestion.

Hyperbaric Oxygen as a Multiplier for Brain Recovery

Dr. Figueroa outlines four effects of hyperbaric oxygen therapy relevant to Alzheimer’s: increased mitochondrial activity, improved blood flow, regrowth of brain vasculature that typically atrophies in Alzheimer’s, and increased stem cell production. Combined with elevated glutathione levels, hyperbaric oxygen is described as a multiplier rather than a standalone fix, since glutathione can help manage the additional oxidative load that hyperbaric sessions introduce.

Genetic Mutations Don’t Rule Out Treatment

Some of Dr. Helman’s most toxic and difficult Alzheimer’s cases carry genetic mutations in glutathione pathway genes such as GCLC, GCM, and SLC7A11. Dr. Figueroa explains that even when an enzyme in the pathway is significantly impaired, flooding the pathway with precursor amino acids can still push some level of glutathione production through the remaining function, a mass action approach that may help even in genetically compromised patients, with intravenous glutathione reserved for the most severe cases.

A Systems Approach, Not a Single Magic Bullet

Both doctors emphasize that Alzheimer’s treatment works best as a layered approach: addressing toxin exposure, supporting glutathione production, incorporating hyperbaric oxygen where appropriate, and sequencing interventions carefully so that detoxification happens before more aggressive treatments that could otherwise release stored toxins too quickly.

Key Takeaways

• Alzheimer’s disease is largely environmental, with only about two percent tied to genetics, leaving most people meaningful room to lower their risk
• Amyloid plaques and tangles may be protective, forming as the brain’s response to toxins like aluminum rather than acting as the root cause of disease
• Glutathione is the body’s master antioxidant, essential for detoxification, mitochondrial support, and immune regulation
• Precursor-based supplementation can outperform standalone glutathione or NAC, since the body manufactures its own glutathione internally without the same gastrointestinal side effects
• Mold exposure and gut damage can block absorption entirely, meaning some patients require intravenous approaches to see results
• Hyperbaric oxygen and glutathione support work best together, forming part of a broader systems based approach to brain recovery

Conclusion:

Alzheimer’s disease is frequently discussed as an unavoidable consequence of aging, but this conversation makes the case that environmental toxins, oxidative stress, and glutathione depletion play a much larger role than genetics alone. For patients and families exploring glutathione support, detoxification protocols, or hyperbaric oxygen therapy, any changes should be made under the guidance of a qualified physician, since underlying toxic burden, genetics, and gut health can all shape how a person responds to treatment.