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With Diseases, Genetics Loads The Gun and Environment Pulls the Trigger


More than 15 years ago, at the start of my medical career and expecting my first child, the neurologist confirmed what the first clinician had suspected — the tremor I had been experiencing over the preceding year was Young Onset Parkinson’s Disease. Life changed forever as I now faced a progressive neurological disease in my twenties. Soon after my own diagnosis, my father also received the same news. He too had Parkinson’s, yet there was no previous family history as far as we could recall. But still, genetics seemed to have loaded the gun; but what exactly pulled the trigger?

More than likely, the exact reason I was challenged with this chronic illness at such a young age, will remain a mystery but I have my suspicions. I grew up in Nova Scotia, Canada — clean air, clean living. Or so I thought. In retrospect, we used a lot of pesticides on our lawn and in our gardens as was customary while I was growing up and our personal water supply came from a well. Since pesticide exposure has now been confirmed as a risk factor for Parkinson’s Disease, it makes me wonder about what toxins may have leeched into our drinking water, an exposure that may have “turned on” existing susceptible genes resulting in this disease.

As a physician, I’ve seen first hand the role that environment and genetics play in determining our health. In fact the cause of all illnesses can really be placed on a spectrum with environment and genetics contributing to varying degrees. The reality is that globally we have seen a rise in the incidence of genital malformations in baby boys, reduced sperm counts in young men, increased incidence of some adverse pregnancy outcomes such as preterm birth, a rise in neurobehavioral disorders in children such as autism and other learning disabilities, early puberty amongst our girls, and increased obesity and Type 2 diabetes rates. Not to mention the worldwide increase over the past 50 years of malignancies such as breast, endometrial, ovarian, prostate, testicular and thyroid as well as childhood brain cancer and leukemia. If one looks at this increased rate of disease incidence over the past decades, it cannot be explained by genetic factors alone. Instead there must be environmental influences that contribute to this change, chemical exposure included.

Regardless of our genes, the more unhealthy our environment, the more unhealthy we are. Reality is that adverse environmental exposures very often pull that proverbial trigger in a gun that may or may not be loaded by genetics. And unlike our genetic makeup, we do have some measure of control over what we bring into our lives. We are now living in a time where our knowledge in this area of medical science has grown, as has the community of like-minded, health and environmentally conscious individuals; people that desire to optimize their own health and that of those they love. Read the rest of the blog here.

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