I personally feel (this is a strictly personal opinion, kindly do not generalize it) that stem cell therapy shouldn't be tried at all. It is an extremely under researched and over rated procedure. Now, regarding PRP, I feel that it gives just about okay results, but the results last only if you keep using Minoxidil. What I think is that prp increases the rate of response to topical treatment not add to the treatment. So, with plain Minoxidil if you were going to get results in 6 months , with prp you might get THE SAME RESULTS in 3 months... NOT EXTRA RESULTS. Finally, the decision is up to you. I've merely voiced my opinion since you asked. I'm not a fan of either procedures.