Parkinson's is the second most common neurological disease after Alzheimer's and affects about one percent of people over sixty. The symptoms develop slowly. These include rigidity, a characteristic resting tremor, and movement dysfunction with walking problems. As it progresses, problems with sleep, thinking, and eventually dementia may occur. Survival after diagnosis is seven to fifteen years. 

Like many neurological problems, PD is a syndrome with recognized clinical characteristics rather than a clearly defined disease with definitive lab tests and treatments. Genetics have been weakly implicated, but cannot be the primary cause because the incidence is skyrocketing. 

Parkinson's (PD), Autism, Alzheimer’s (AD), Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS or Lou Gehrig’s disease) are likely caused by toxins. Ken Stoller lays out some of the evidence implicating glyphosate in Incurable Me: Why the Best Medical Research Does Not Make It into Clinical Practice (2015). 

US government databases were searched for… crop data, glyphosate application data and disease epidemiological data. Correlation analyses were then performed on a total of 22 diseases… Correlation coefficients are highly significant (< 10–5) between glyphosate applications and hypertension (R = 0.923), stroke (R = 0.925), diabetes prevalence (R = 0.971), diabetes incidence (R = 0.935), obesity (R = 0.962), lipoprotein metabolism disorder (R = 0.973), Alzheimer’s (R = 0.917), senile dementia (R = 0.994), Parkinson’s (R = 0.875), multiple sclerosis (R = 0.828), autism (R = 0.989), inflammatory bowel disease (R = 0.938), intestinal infections (R = 0.974), end stage renal disease (R = 0.975), acute kidney failure (R = 0.978), cancers of the thyroid (R = 0.988), liver (R = 0.960), bladder (R = 0.981), pancreas (R = 0.918), kidney (R = 0.973) and myeloid leukaemia (R = 0.878). 

He also says that many other toxins increase the chances of developing PD. Paraquat exposure, for example, increases the risk 2.5-fold. Ken goes on:

The latest research shows that AD, PD, and ALS share a common, or at least overlapping, pathologic mechanism(s).98 This implies that AD, PD, and ALS are essentially the same disease with a slight variation on a theme. The theme is pesticide poisoning, and there is a synergistic99 effect of heavy metals (think aluminum and mercury)…Assuming one does not have Lyme or Parkinsonism from a toxic exposure, such as carbon monoxide, it is worth a trial of 4-PAS or 5-ASA, which will selectively chelate manganese (Mn) from the human body. Mn is an essential trace element but can be absorbed or ingested in toxic forms and in excess. Exposure can be from gasoline to well water. If the 4-PAS or 5-ASA changes symptoms, this is about Mn toxicity issues.119 Glutathione is not a specific detoxification agent for just Mn, but a large dose will help remove some of it. Mesalazine, also known as mesalamine, is 5-aminosalicylic acid (5-ASA), and like 4-PAS is considered by conventional medicine to be anti-inflammatory because it helps treat inflammatory bowel disease. It is the active part of the antibiotic sulfasalazine, which is used to treat Crohn’s disease.

for more, see https://robertyoho.substack.com/p/244-wholistic-treatments-for-parkinsons#details

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