Through the technology of transdermal patches, PatchMD has put together a line of vitamin and mineral patches. All of their products are sourced and manufactured in the USA, with manufacturing facilities in Nevada. Each PatchMD packet has a 30-day supply and utilizes hypoallergenic 3M medical grade tape. Patches adhere best to parts of the body that have little to no hair such as your shoulder, back or hip. Just peel & stick!