Nelson Vergel
Founder, ExcelMale.com
This option has not become popular since it requires twice daily application on gums. Here is some recent data. It is not a new option despite what the title says.
http://readtiger.com/jcem.endojournals.org/content/89/8/3821.full
http://readtiger.com/jcem.endojournals.org/content/89/8/3821.full