I have seen the study, there is also this one. See what they say:
NEJM Journal Watch reviews over 250 scientific and medical journals to present important clinical research findings and insightful commentary
www.jwatch.org
COMMENT
The proposed mechanism for hair growth in androgenic alopecia after botulinum toxin A treatment is that paralysis of the scalp muscles enhances blood flow to the scalp by reducing the tension on the scalp skin. Because the conversion to dihydrotestosterone (DHT) is enhanced in a low-oxygen environment, oxygenated blood reduces this conversion and increases conversion to estradiol. This might be the same mechanism by which minoxidil affects androgenic alopecia. The 18% increase in hair count is similar to that achieved with finasteride. How injecting BTX A into scalp muscles could be protected as intellectual property is difficult to see.
And I have seen similar theories as to why botox works for growth.
Question is therefore: Wouldn't scalp
massage and stretching achieve the same thing? I have to check the number but the growth after a long period of massage was not too bad at all.