Advantage Pharmaceuticals - Manufactures and sells Invive brand silver protein. Natural Immunogenics Corp - Manufactures laboratory produced Sovereign brand colloidal silver, and offers laboratory analysis of colloidal silver products. Purest Colloids, Inc. - Manufactures Mesosilver brand colloidal silver. Earthborn Products - Markets 100 ppm Monatomic colloidal silver, and provides information on research, safety, uses, and dosage. CS Pro Systems, Inc. - Offers colloidal silver and CS generators American Biotech Labs - Manufacturer of ASAP brand colloidal silver.