NasalGuard has a 20 year history and to date over 12 million allergy sufferers have benefited worldwide. Trutek Corp., a USA company, holds the patents and is the manufacturer and global distributor of NasalGuard gels and NasalGuard® Technology. First introduced in the US & Canada in 2003 (orginally called Aller-Aid), NasalGuard Allergy Blocking Gel expanded to Europe in 2005 starting with Germany, followed by UK, and Italy in 2010. In UK the product is sold as AllergieBLOCK® along with a sister product called Cold&FluBLOCK®. In Japan since 2008, NasalGuard Technology is sold under brand names of "Crystal Veil" "Crystal Veil Cool" and "Nurumask". Please check NasalGuard Allergy Blocking Gel for more information.