Hello Doctor ,
I have been taking propecia for 6 years with a great success , but i am close to 30 years now , and i was wondering if i could stop it now. Don’t you think that with our Testo levels decreasing over age (about 2% per year after 30) , the DHT levels will decrease too, so that we could stop the propecia by getting older ?
Good thought, but taking Propecia is not directly related to testosterone levels. Propecia affects DHT levels, and even DHT levels do not tell the full story. For example, even with high testosterone levels, you can have NO hair loss. Conversely even with low testosterone levels you can have massive hair loss.
The root of the problem (pardon the pun) for hair loss in men is genetic, not DHT. As such, there is no definitive cure. But if Propecia is working well for you to this point and you have no problems, why stop it? In reality, you should never stop taking it, as long as you wish to retain your hair.
![]()
![]()
Paid advertisements (not an endorsement):



Although there’s enough political tension in the news lately to cause me to not want to delve into policy talk, I can avoid this topic fairly easily as I really have no idea about the political climate for stem cells. While it is an interesting question, I don’t even know that stem cell therapies hold the most promise to be first across the finish line in cure development. There’s
Read the rest at —
I know nothing more about the Histogen HSC (Hair Stimulating Complex) than you do by watching those videos. I do give credit to Dr. Naughton for appearing in the videos, but I always worry about market hype and speculation in such announcements. I doubt we’ll see it move through the pipeline as quickly as hoped, but we can all keep our fingers crossed that I’m wrong.
I commend you on your scientific reasoning and approach, but I must point out one flaw: human beings are not computers and can be somewhat lazy in nature. We have a hard time keeping to a set schedule no matter how simple it may look on paper. Can you remember to brush your teeth exactly at a certain time? Maybe it would be a different story on Mars, but it’s hard enough to get someone to take one pill just once a day. Compliance is the issue at hand. One more thing which may be a bit more important — the half life of finasteride is about 4 hours. To maintain a constant level, the presence of the drug will deteriorate on a minute by minute basis so you might need to actually take 0.125 mg per hour or 0.00209 mg per minute. Try that for a compliance model.