Clinical tests done here in the U.S. and in Germany have verified this. Presently, the 70 year old T.J. Clark mine is the only one of its kind that has been discovered. It is owned and operated by the third generation of the Clark family and no other person or companies have mineral rights to it. Each 4 Fl. Mix with in fruit or vegetable juice if desired, preferably with meals.
Individual requirements vary and best results are obtained by determining one's own needs.