Remember, Rosemary Jacobs took silver nitrate nose drops. Silver nitrate had huge size silver particles in it and also highly concentrated with high ppm silver. We do not recommend anything like that. Modern electro- Colloidal Silver has extremely small mircoscopic particles which are easily excreted by the body within 3 days. It is also 5-20ppm as opposed to high ppm silver nitrate. Pharmaceutical compainies want to supress the use of CS because it works so well. Unfortunately Rosemary Jacobs is a pawn. If you are using clear, low ppm CS, you are fine.