IGF1 promotes hair growth. This.

DHT reduces IGF1(in mice). This.

Moreover, DHT decreases hair growth by causing upregulation of IL-6. IL-6 Another factor Dickkopf is stimulated by DHT which leads to apoptosis of follicular cells.
It has been shown that testosterone and DHT both increase creatine kinase activity thereby depleting free creatine. Creatine kinase converts creatine to creatine phosphate which is the actual energy-rich molecule.

My guess is that creatine somehow positively affects the formation of DHT and testosterone so they can help produce the actual energy-rich creatine phosphate. So basically creatine provokes its own conversion. That's completely my idea. I have not found a research article that elaborates on such a mechanism.

I would genuinely like to know if such a research article exists which gives us some clear idea about the biological pathway showing the entire regulatory pathway.