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Avoiding Dairy to Prevent Parkinson’s

There are four things that may reduce our risk of developing Parkinson’s disease: increase exercise, and avoid dairy products, pesticides, and head trauma (please  wear your seatbelt and bike helmet!).

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 my 3-min video Preventing Parkinson’s Disease With Diet 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? Please check out my video Treating Parkinson’s Disease With Diet.

-Michael Greger, M.D.

PS: If you haven’t yet, you can subscribe to my videos for free by clicking here and watch my full 2012 – 2015 presentations Uprooting the Leading Causes of Death, More than an Apple a Day, From Table to Able, and Food as Medicine.

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Michael Greger M.D., FACLM

Michael Greger, M.D. FACLM, is a physician, New York Times bestselling author, and internationally recognized professional speaker on a number of important public health issues. Dr. Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before Congress, appeared on The Dr. Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial.


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