MAO-B Inhibitor supplements or herbs

Q. Hi, I am interested in finding information about herbs that inhibit MAO-B. I understand the herb fo-ti, has ability to inhibit MAO-B, but am concerned about its estrogenic profile. Do you know of any other herbs that inhibit MAO-B.

 I was wondering if there are any natural or non prescription MAO-B inhibitors. It is my understanding that deprenyl is reasonably safe with low dosages even though it is a prescription, but I would still prefer something even less harsh that still has an effect if there is anything like that.
    Higher dosages of deprenyl may cause heart rhythm disturbances. Since herbs have a number of active compounds, compared to drugs that have one active substance, it is difficult to find an herb that has a high level of MAO-B inhibition. I am not aware of such yet.