renin

I think excess cortisol-aldosterone- mineralocorticoid activation trough angiotensin system are main players in balding by cytokine activation and progressing to fibrosis. Focusing on TGF-β₁, which shuts off the anagen phase of the hair cycle, and 11β-HSD₁ expression should fix to the problem...

Another big point in favor of salt and this time the scientists actually provide salient explanation for why the low salt diet was detrimental - i.e. it increases renin, aldosterone and adrenaline. Pretty much what Peat wrote...about 30 years before this study. It also matches well another study...