Twenty units is the minimum. This is typically enough for one major treatment area: Forehead, 11's, or Crowsfeet. However, each patient is unique and may require additional units. Other areas that may be treated include masseters, temporalis, bunny lines, DAOs, chin, and neck! Ask your injector for their opinion on where tox treatment would look best with your anatomy. Jeuveau is a safe, FDA approved neurotoxin used to prevent wrinkles. It works by temporarily freezing muscles so that particular facial expressions cannot cause unwanted lines. Patients typically report a faster onset of action and longer duration of action when compared to Botox. Correction is typically noticeable by day three, and full effects can be seen after two weeks. On average, results last from three to four months.