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 foods lack any significant amount of cholesterol, which is linked to heart disease. They also can include nutrients vital to our health, including fiber and antioxidants, which provide good colon health and aid in preventing numerous diseases. But while vegan diets can be healthy, they arenât necessarily. In a world where processed foods have taken over our grocery stores, all diets, including vegan, can be inundated with unhealthy foods. The first major difference I see between a healthy and unhealthy vegan diet is the lack of important nutrients.