Neti Wash Silver is a superior quality colloidal silver in both purity and concentration when compared to other silver products available in the marketplace. This product is perfect to add to the Neti Pot during times of excess congestion and seasonal challenges (especially winter and spring). Neti Wash Silver is perfectly safe to be used internally at the same time for additional immune support.The mild silver protein used is silver chelated to a protein, which keeps it in suspension much more effectively and is safer than the electrolysis process. Neti Wash Silver is a pharmaceutical grade of silver where no chemicals are used in the processing. Testing and assays of the finished product is completed by independent labs for micron particle size, parts per million, and other analytical tests for purity. As a general rule, the higher the concentration of colloidal silver, the darker the color of the solution with a dark yellow/brownish amber color being the highest quality. Particle size must fall between 0.001 and 0.01 microns to be considered a colloidal solution. Any size below or above these parameters is not a true colloid. There are no known allergic reactions from the use of properly prepared colloidal silver, according to scientific literature. Additionally, there has never been a recorded case of a drug interaction with any other medicine other medicine or herb. It is non-addicting, the body does not build up tolerance to it and studies show that properly prepared colloidal silver is not deposited in or under the skin like other types of silver compounds.