Brain-First or Gut-First? Rethinking Parkinson’s Disease w/ Drs. Ray Dorsey & Michael Okun

Mark Hyman

Oct 8, 2025

Episode description

Today we tackle Parkinson’s as a preventable epidemic—not an inevitable fate. I’m joined on The Dr. Hyman Show by two of the field’s top neurologists, Drs. Ray Dorsey and Michael Okun, co-authors of The Parkinson’s Plan, to unpack why cases are exploding and what we can do about it right now.

We look at how toxins drive disease, why Parkinson’s goes far beyond dopamine, and the early signs most people miss—plus what you can do today to protect your brain. And we connect the dots between environmental exposures—whether from food, water, or even recreational spaces—and the growing burden of neurological disease. Watch the full conversation here or listen wherever you get your podcasts.

[YOUTUBE THUMBNAIL]

We also explore:

• How to spot early signs—like loss of smell—long before a diagnosis

• Everyday ways to cut toxin exposures in your food, water, and home

• Why Parkinson’s is a whole-body disease, and what that means for prevention

• The kind of exercise that protects your brain and slows progression

• Simple nutrient checks that can support medication and brain health

Parkinson’s isn’t inevitable. Protecting brain health starts with small daily choices. These are steps you can take right now for yourself and your loved ones. With awareness and action, you can build resilience today and help shape a healthier future.

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Mindsip insights from this episode:

Supplement with multivitamins to counteract L-dopa's B vitamin depletion

The common Parkinson's drug L-dopa can deplete cofactors like vitamin B6, making a daily multivitamin a practical necessity for patients.

#Parkinson's

#vitamin-B

Avoid living near golf courses to reduce Parkinson's disease risk

Individuals living within one mile of a golf course have a 126% increased risk of developing Parkinson's disease.

#Parkinson's

#risk

Recognize early non-motor signs of Parkinson's in middle-aged men

Early, pre-motor symptoms of Parkinson's can include constipation, acting out dreams, loss of smell, and even new-onset anxiety in middle-aged men.

#Parkinson's

Address Parkinson's rise outpacing Alzheimer's incidence

Adjusted for age, the incidence of Parkinson's disease is rising 60% faster than Alzheimer's disease.

#Alzheimer's

#Parkinson's

Recognize Parkinson's as a whole-body condition to address associated risks

Contrary to the myth that it's just a brain disease, Parkinson's is a whole-body condition that doubles the risk of melanoma and osteoporosis.

#osteoporosis

#Parkinson's

Distinguish between brain-first and body-first Parkinson's types

There are two proposed forms of the disease: a 'brain-first' type from inhaled toxins and a 'body-first' type originating from ingested toxins in the gut.

#Parkinson's

#toxin

Recognize long-term toxin exposure risks for Parkinson's disease

Marines exposed to the chemical TCE at Camp Lejeune for just 25 months showed a 70% higher rate of Parkinson's 34 years later.

#Parkinson's

#toxin

Advocate for policy changes to prevent toxin-induced diseases

The most effective prevention for toxin-induced diseases will come from policy changes that ban harmful chemicals, not from an individual taking a pill.