ho·me·op·a·thy
ˌhōmēˈäpəTHē/noun
the treatment of disease by minute doses of natural substances that in a healthy person would produce symptoms of disease
Since there's almost no regulation the buyer has no way of knowing if it was correctly diluted or not.
http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/uc...
http://arstechnica.com/science/2016/10/fda-homeopathic-teeth...