Parkinson's disease (PD) is a type of movement disorder. It happens when nerve cells in the brain don't produce enough of a brain chemical called dopamine. Sometimes it is genetic, but most cases do not seem to run in families. Exposure to chemicals in the environment might play a role.
Why Vegans are Often Deficient in Vitamin B12. The few plant foods that are sources of B12 are actually B12 analogs. An analog is a substance that blocks the uptake of true B12, so your body's need for the nutrient actually increases.
Vegan. Does not eat dairy products, eggs, or any other animal product. So in a nutshell, a vegetarian diet excludes flesh, but includes other animal products: A vegan diet is one that excludes all animal products.And I have to say that I have met very few vegans who stop with what they put in their mouths.oes not eat dairy products, eggs, or any other animal product. So in a nutshell, a vegetarian diet excludes flesh, but includes other animal products: A vegan diet is one that excludes all animal products. And I have to say that I have met very few vegans who stop with what they put in their mouths.