610 citations,
April 2014 in “Nature Reviews Immunology”
The document concludes that understanding how the skin's immune system and inflammation work is complex and requires more research to improve treatments for skin diseases.
A user found out they are vitamin D deficient and was prescribed high-dose vitamin D supplements, asking if others had similar experiences and if it improved their hair. Some shared improved mood and testosterone levels after treatment, while another combined vitamin D supplements with finasteride due to family history of baldness.