3 citations
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April 2017 in “Zahedan Journal of Research in Medical Sciences” Almost all kidney transplant patients had complications from immunosuppressive therapy, with excessive hair growth being the most common.
1 citations
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March 2023 in “Journal of the American College of Cardiology” 
June 2025 in “BMJ Case Reports” Axitinib treatment turned a man's grey hair back to black.
Finasteride can cause long-term side effects like sexual dysfunction and depression.
January 2024 in “Aging medicine” A COVID-19 infected patient with chronic kidney disease experienced worsened kidney function, hair loss, and unexpected wart clearance.
March 2009 in “European Urology Supplements” 
A young woman with kidney failure had hair loss due to a common hormonal disorder, which improved with hormone therapy.
January 2006 in “Basic & Clinical Medicine” Hair keratin doesn't significantly affect rat organ function but may help detect early rejection through blood changes.
19 citations
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November 2012 in “Cell Communication and Signaling” FGF-9 speeds up the early development of certain organs, showing potential for organ regeneration.
17 citations
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May 2016 in “Archives of Dermatological Research” Reflectance confocal microscopy can help tell apart scarring from non-scarring hair loss.