Colloidal silver is a suspension of ultra-fine silver particles in a suitable base. The highest quality is produced by non-chemical method, where the sub-microscopic, negatively charged silver particles are kept in suspension in de-mineralized water. These particles posses a uniform charge, zeta potential that helps in preventing the aggregation. Purer forms of the preparations are colored golden yellow. If the preparation is specified to be refrigerated or is found to contain aggregates at the bottom, then it can be safely assumed to be contaminated with other ingredients apart from the silver particles.

Colloidal silver has been used for healing in the practice of Eastern medicine. Research studies in the early twentieth century have shown that it is an effective mechanism for curtailing infective agents such as viruses and pathogenic bacteria and fungi. The silver ions inhibit the oxygen metabolic pathway of the unicellular pathogens and destroy the micro-organisms. Subsequently, they are identified and eliminated from the body by the immune and the lymphatic systems.

There are conflicting reports regarding the long-term use of colloidal silver. Some studies implicate the use as a major cause for aggria, a debilitating condition due to the deposition of silver salts in various tissues such as the skin, eye, and internal organs. However, some others cite case studies that highlight its potential anti-fungal and anti-viral properties and propose no harmful side effects even after the administration of large doses over extended periods. There are several articles in support of its non-allergic, anti-infective, and healing properties. The healing ability is attributed to the alkaline nature of colloidal silver.

Silver is an important trace element required for the human body. It contributes to 0.001% of the minerals and deficiency can result in functional impairment of the immune system, a major defense mechanism of the body.

Colloidal silver has amazing properties. It is a highly versatile substance with several applications in healing afflictions by either a topical preparation or through ingestion as a liquid, in veterinary science, and gardening and against infectious micro-organisms. It is considered as a suitable antiseptic for application to babys eyes and one of the best deodorants on the market.