Found the link
http://www.hairlosshelp.com/qna/Detail. ... ExpertID=8
Here is the Q/A
Ben asked: "good day Dr Lee Im a 25 year old male experiencing male pattern baldness Im about a norwood I recently began doing what has been termed scalp exercises. I know this sounds illogical to do this but Im desperate for any kind of help and Im worried about propecia systematic effects and damage it may do to my frontal hairline. But during these exercises there is an increase in blood flow to the scalp and as ive heard that this could be the reason these exercises are able to maintain hair count but If you increase bloodflow in anyway to th scalp would you be increasing dht exposure as well?..As Ive heard blood is the carrie f dht..please advise..thank you sincerly Ben"
Dr Richard Lee, MD answered: "Although an adequate oxygenated blood flow is necessary for any and all of the tissues of the body to function properly, not all disorders of the body are related to decreased blood flow. For example, a decreased blood flow in the scalp is not the cause or even a factor in the cause or causes of male pattern baldness. Consider this: when hair follicles are transplanted from the occiput to any of the areas affected by male pattern baldness, they will continue to produce full thickness hair shafts. If the native hair follicles in the recipient sites were compromised due to decreased blood flow in the area, the transplanted hair follicles would not be expected to produce mature, thick hair. But, they do, simply because they are genetically encoded to do so.
Vascularity (blood flow) to the scalp does not significantly change with age. All you need for proof is a simple cut in the skin anywhere in the scalp. Bleeding is always profuse.
You are not putting your hair follicles at greater risk for male pattern baldness by doing "scalp exercises". If it gives you comfort to do so, you should continue your exercise regime.
I can appreciate your concern in regards to the use of finasteride (or any other systemic medication) to lower the levels of DHT in the scalp, especially at your young age. Since you still have an enviable head of hair (Norwood 1) and wish to maintain it, I'd suggest simply shampooing every third day or so with a shampoo that contains ketoconazole. Ketoconazole has been proven to inhibit the synthesis of DHT and that's a treatment regimen for male pattern baldness that easy to comply with.
Richard Lee, M.D. "