I have used Revivogen for about 9 months, and I can say that it seems to work at least to some degree.
I realized I was a diffuse thinner about a year and a half ago, and I started casually researching my options around that time.
Well, 6 months later my situation had gotten much worse, and I decided to take the conservative route and go with Revivogen. After all the research I've done (and despite the reassurances of HairLossTalk.com and others on the forum), I really would rather avoid systemic hormone manipulation via propecia or any other drug if possible. With that said, I'm constantly on the look out for a killer topical that has solid science and research behind it - Revivogen is sadly lacking on the clinical studies, but I have no doubt that it's a legit treatment.
One reason I think Revivogen worked is that I went through a MASSIVE shed a month into using it. I'd never shed as much as I did at that point (if I had, I can guarandamntee you I would've gotten on treatments immediately), and we're literally talking about me rubbing my head through my hair and getting 5-10 hairs with any given swipe. I thought, "good god, if I wipe my head 300 more times, I'll be completely bald". Luckily that was the only massive shed I went through (lasted about a week), and I have since stabilized. As far as I know, the shedding was a good sign of a topical treatment starting to work on dying hair.
I still lose hair, but nothing too alarming. Before Revivogen I was noticing about 10-15 hairs on my hands everytime I took a shower, and now I'm down to 3-5, and on some mornings none. Throughout the day I notice a few stray hairs on my desk, but again, I think this decreased significantly after starting Revivogen.
I will say two things about Revivogen, though:
1) I think you MUST use it with other treatments to maximize success. The first 3 months or so I was using it without using Nizoral. Now I'm using Folligen in the morning, Revivogen at night, and rotating tea tree oil shampoos with Nizoral. I think scalp health is of utter importance in the hair loss fight, and I think getting my scalp healthy helped Revivogen do its work -- pure speculation though.
2) Don't expect obvious results with any hairloss treatment within the first 3 months. To think that you will see visible regrowth after 3 months seems to me to just be simply ludicrous unless you have a bald scalp that is suddently sprouting hairs. The hair rest/growth cycle is way too long to see your hair count increase significantly between month 0 and month 3, and probably even between month 0 and month 6, in my opinion.
With that said, I think over the past 9 months that Revivogen (coupled with Folligen, Nizoral, and tea tree shampoos for scalp health) has slowed down my hair loss fairly significantly, but I don't have delusions that it has stopped it completely, and I'm STILL exploring the topical route.
I almost jumped on the spironolactone/revivogen bandwagon several months ago, but after a lot of research and some deliberation, I have decided to give Fluridil a try. I have a 3 month supply of that on the way, and I have just received a 3 month supply of Revivogen, so I'm going to try to go the topical DHT blocker/ anti-androgen combination route. This is a WAY expensive experiment, but it's just for 3 months, and I want to see if it's possible to see a complete cessation of hair loss in about 3-6 months time with that regimen. Plus, it's possible I could lower the doses of each and get away with stretching out the treatments more.
Sorry for the long post, but I think I represent the average diffuse thinner who feels a little too young and conservative to jump into taking oral dht blockers and feels some hope that the topical route can truly have an impact on hair loss.
And, no, I have not started minoxidil. I'm more interested in stopping my hair loss at this point than worrying about regrowing hair (while also still worrying about stopping hair loss). If I can see a complete cessation of hair loss in 3-6 months of using Fluridil, Revivogen, and Folligen together, I think that's worth $100/month at my age, knowing that within 3-5 years we should have even more scientifically sound treatments available to us.