Five
It is allowed because the doctors will not speak out about it.
I asked my doctor one time, and his answer was that if they speak out they will be critisized. Looks like AMA power here. All the people ailing from
Mono-Sodium-Glutamat (Natrium Glutamat) and the likes make good business for the med/pharma industry. Often they are mystery illnesses that keep your going back to the Dr. & buying more meds.