. . "These organic derivatives of metals areusually soluble in organic solvents, more particularly in chlorinated solvents such as chloroform or dichloromethane.It will also be possible for the metal to be introduced by previous extraction from foods or plants known to be rich in this metal (black pepper, parsley, basil, dill . . . ).Sitosterol will preferably be used in admixture with a relative amoun" . .