There's no question that you are right about the hormonal involvement and the onset of puberty. The fact that many of us begin to lose our hair at that time isn't just a coincidence. However, I have watched as many friends have begun to experience hair loss at later ages too. Some in their late twenties, some in their thirties, and so on. Hormones alone don't answer the question of the cause of alopecia. There's not much that I can do about the fact that, as a new member, I don't seem to be permitted to provide links to the actual medical research connecting all of the dots which I have described. However, if you investigate things like the medication, ruxolitinib, you will find that it is approved for treatment of bone marrow disease and yet also appears to completely reverse baldness (unfortunately, only for as long as you keep taking it). There's no doubt that alopecia is a very complex condition and that different factors are involved in each individual. Many people suffering from coeliac disease only have to remove gluten from their diet in order to reverse their baldness. Like many others, that wasn't the case for myself. To me that just indicates that a more complex picture had developed since I lost my hair and, at the moment, I am trying to connect some dots between coeliac induced hyperparathyroidism and why the body produces the 5-alpha reductase which converts testosterone to dihydrotestosterone. Other people just need to include things like vitamin D or K in their diets to cure their alopecia. Always just more questions. Of course, I could spend my time making jokes about our conditions, like many others on this site, but the question on this thread posed the specific question about why no one at the low end of the autism spectrum had solved alopecia. Although this question was asked relatively flippantly the fact is that I have been trying to demonstrate that most of the answers are already out there in the available research. You just need to look.