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.
Q. I currently follow a strict vegetarian diet and consume no animal products at all. Since vitamin B12 is missing from the vegan diet, I wonder how many micrograms of it I should take.Iâve seen B12 pills of up to 1500 micrograms each in my food co-op, but the daily requirement is just 3 micrograms.A. Vitamin B12 deficiency is far more common than most people realize.Vegans (who eat no eggs, dairy or other animal products) are frequently lacking in this essential nutrient. Older people and those who take powerful acid-suppressing drugs may also be low.. Vitamin B12 deficiency is far more common than most people realize. Vegans (who eat no eggs, dairy or other animal products) are frequently lacking in this essential nutrient. Older people and those who take powerful acid-suppressing drugs may also be low.