Trace® Minerals Colloidal Silver Supplement- 30 Ppm - 4 Fl. Oz. Colloidal Silver Is A Dietary Supplement With Over 30 Ppm Per Serving Of 99. 999% Pure Colloidal Silver. We Use Proprietary Technology To Process This High Quality Colloidal Silver For Maximum Effectiveness. Gluten Free 30 Ppm Per Serving Certified Vegan | Trace Minerals Colloidal Silver Supplement Vegan - 4 Oz. (24 Servings)