Ionic nano-particle colloidal silver, 12 parts-per-million in distilled water.
Do not mix colloidal silver with any other substances; it is recommended that silver be taken alone. Needs no refrigeration but stays more potent when stored in a cool, dark place.
SPECIAL: Free Bonus 1oz nasal sprayer bottle also filled with 12 ppm colloidal silver when you buy the 2oz dropper bottle! Just select the Special in the dropdown menu.
Four once size comes in an amber bottle.