Want to Help Prevent Parkinson’s Disease? Avoid This.

Four things we can do that may reduce our risk of developing Parkinson’s disease are: increase exercise; and avoid dairy products, pesticides, and accidents that damage the head. (The latter means wearing your seatbelt and bike helmets.)

What about avoiding pesticides and other industrial pollutants? A recent autopsy study found higher levels in the brains of Parkinson’s victims of certain PCBs found in Monsanto’s Aroclor, which was banned in 1979. The more PCBs found in the brain, the worse the brain damage. The worst three appeared to be PCBs 138, 153, and 180, all of which are significantly lower in the bodies of those eating plant-based diets (see Industrial Pollutants in Vegans).

So, does a vegan diet reduce the risk of Parkinson’s disease? If you watch the above 3-min. video you’ll see that every prospective study looking at dairy products and Parkinson’s disease found an increased risk associated with consumption. This may be because dairy products in the United States are contaminated with neurotoxic chemicals. Autopsy studies consistently find higher levels of pollutants in the brains of Parkinson’s disease patients, and some of these toxins are present at low levels in dairy products.

Tetrahydroisoquinoline is one such parkinsonism-related toxin found predominantly in cheese. Although the amounts of this neurotoxin—even in cheese—are not very high, the concern is that the chemical may accumulate in the brain over long periods of consumption resulting in the brain damage associated with Parkinson’s diease.

I also touch on Parkinson’s in:

Avoiding dairy may have other benefits. See, for example:

What if it’s too late and you or a friend or family member already have Parkinson’s? In my Care2 post on Friday I’ll cover Treating Parkinson’s Disease With Diet.

In health,
Michael Greger, M.D.

PS: If you haven’t yet, you can subscribe to my videos here and watch my full 2012 year-in-review presentation Uprooting the Leading Causes of Death.

Image credit: National Cancer Institute / Wikimedia Commons

Preventing Blindness With Diet
Does Skim Milk Cause Acne?
The Effects of Cow’s Milk on Babies


Wendy J.
Wendy J1 years ago

Thank you for sharing the important information.

Kay M.
.3 years ago

Thank you doctor, very informative article and I enjoyed reading the comments from the care 2 members..

Fred Hoekstra
Fred H3 years ago

Thank you Dr. Michael Greger, for Sharing this!

Janet B.
Janet B3 years ago

If it is genetic....there is no way of stopping it! Or anything else genetic....

Camilla Vaga
Camilla Vaga3 years ago


Ernie Miller
william M3 years ago


Spirit Spider
Spirit Spider3 years ago

Thanks :-)

Beverly Morgan
Past Member 3 years ago

Wow,great info, thank you!

Margaret C.
Margaret C3 years ago

Thank you, I'll make sure I stay away from these things.

june t.
june t3 years ago