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.
A vegan does not eat meat, poultry, fish, eggs or dairy products. A lacto-vegetarian diet does not include meat, poultry, fish or eggs.However, lacto-vegetarians will eat dairy products, such as milk, cheese and yogurt. A lacto-ovo vegetarian diet only excludes meat, fish and poultry, while eggs and dairy products are allowed.roteins. Since vegetarians do not eat any type of meat, they must be sure to get enough protein from other types of foods. MayoClinic.com recommends vegetarians eat at least five daily servings of protein-rich foods, such as beans, legumes, nuts and soy.