------------------------------------ 100 mg of licorice root extract ---------------------------------
I have been taking a low dose of licorice root extract for about seven months. I have experienced no adverse effects. I did not think it was doing anything so I stopped for a few days. I noticed a small but definite worsening of my symptoms, which reversed when I resumed taking it. Similarly, there is a controlled study that showed a small benefit.
Licorice is an MAO-B inhibitor and may have other modes of action. It has adverse affects at higher dosages. See the details in my report, Licorice - Candy Or Medication, which I published here: tinyurl.com/y9mjdhjt