How does Fin inhibit 5AR?

I’ve been looking for info about how Fin inhibits 5ar and can’t really understand what it’s doing.

Does it prevent/stop the body from producing 5ar OR bind with 5ar to stop it from working? Or is there some other mechanism at work?

google.com/patents?id=x_MXAA … ng#PPA5,M1

It binds to the 5AR enzyme irreversibly, thus inactivating it. Once you stop taking Fin, 5AR begins to regenerate, DHT returns to baseline approximately 1-2 weeks after last dose but may take up to a month due to ~30 day off-rate of the 5AR enzyme.