Interesting, I thought it binds to DHT. I will dig a bit more when I have time. @That Guy did a nice recap there :I think It depends of how much the shedding is reduced, and how much regrowth we obtain; so we can then label the treatment as a "complement" or a "pillar treatment".
Lets not forget that finasteride could be described the same way: pills to reduce the hair loss, and regrowth a bit.
The only thing that bothers me, is that they say that equol attaches to/blocks alfa reductase, instead of DHT. I think that difference is crucial, not only for the effectiveness, but also to avoid sides...
https://www.gourmetstylewellness.com/interact/threads/the-big-bad-awesome-brotzu-lotion-faq.100452/