These items can almost all be purchased at Beyond a Century . Their prices are extremely low and many of their items are not easily obtainable anywhere else. They will send you a catalog with your first order with an interesting descriptive summary of most of their items. The dose and composition is not an exact science. Cannot be used by harmful bacteria or yeast in the mouth or digestive tract.
Primary purpose is as a sweetener and to mask the flavors of the other ingredients.
The quantity depends on your taste. A side benefit is that it coats bacteria in the mouth so that they are less likely to cause dental caries. 4 parts Silymarin - for liver health. 1 part Astaxanthin - a powerful antioxidant. This is based on the fact that high doses can mask the diagnosis of pernicious anemia.