Topical vitamin D was successfully used to treat other forms of baldness, including areata and Telogen Effluvium, and was very effective (s. for example
here).
I also found this quote to be interesting:
I don't know of any studies which used topical vitamin D to treat Androgenetic Alopecia, though. Not going to try this on my own, will stick to the supplements for now. Already did my first Follica-like needling session today (but didn't quite manage, don't have any numbing creme here and the Follica protocol with my TBPHP pen is not so easy to replicate).
In all honesty, I am not very optimistic that vitamin D plus Follica-style needling is the magic combination which will suddenly give me regrowth. You would think that somebody would've already tried that. Then again, vitamin D was completely overlooked in medicine until a couple of years ago and even more so in Androgenetic Alopecia. Maybe no one thought it could be that, so no one tried it yet. Who knows. In a few months we will know more, I'll go with vitamin D at 4000 IU/d for 12 months now.
Current state: NW3 bald, strong diffuse vertex thinning in NW4, age 31.
My regimen right now looks as follows:
- minoxidil 5% once per day (except needling days)
- anti-inflammatory diet (adjusted vegan diet: no alcohol, strongly limited sugar, strongly limited carbs, limited grains, but added eggs and fish)
- Follica-style needling every two weeks
My new regimen, starting from today for (hopefully) 12 months:
- minoxidil 5% per day (except needling days)
- anti-inflammatory diet (adjusted vegan diet: no alcohol, strongly limited sugar, strongly limited carbs, limited grains, but added eggs and fish)
- Follica-style needling every two weeks
- vitamin D 4000 IU per day, split into once in the morning and once in the evening
I thought it was common knowledge by now that these questions are answered by the sex-specific differences in the immune system. The male immune system uses DHT in inflammatory responses in certain tissues much more than the female immune system does. If you take anti-androgens or 5ARIs, you are killing that part of the inflammatory response of the male immune system. See, for example,
this article for sex differences in the immune system. This is also part of the reason why viruses affect men and women differently.
For the role of DHT in inflammatory response, see for example
here and
here.
Edit: Just thought of something. One of the best microneedling responders ever, Somebody/Alex, switched to a traveling lifesytyle (in Asia) at the same time as picking up needling. Maybe his move gave him way more vitamin D than he had before, hence explaining his results that most microneedlers never achieved?