Boehmeria Nipononivea and Hair Loss

I was wondering what is your opinion on Bohemeria Niponivea:

PDF file – The Effect Of Herbal Extract On Hair Growth In Female Androgenic Alopecia

Many thanks and have a wonderful day.

An excerpt from the article states, “A specific extract from leaves of Boehmeria nipononivea (a plant of nettle family from Japan and China, well known in traditional medicine) has a very effective 5-a-reductase inhibitory activity for the presence of several specific fatty acids.”

While this is an interesting article, I really know nothing about this herbal plant. I am concerned that the authors show a connection between DHT and blocking DHT with the relationship between sebum production and hair loss. Some of the material is suspicious and I had problems connecting the dots on the logic. If the herbal is safe (I don’t know that it is) then trying it may be worthwhile.