188 citations
,
  January 2003   in “Recent results in cancer research/Recent Results in Cancer Research”    Vitamin D is essential for bone health and may reduce risks of several diseases.  
               86 citations
,
  April 2009   in “Journal of anatomy”    Hard skin features like scales, feathers, and hair evolved through specific protein changes in different animal groups.  
     
           39 citations
,
  June 2019   in “Nanomaterials”    Nanotube-based hair treatments could improve hair health and growth, and offer long-lasting effects.  
     
           36 citations
,
  November 2019   in “Molecular biology and evolution”    Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.  
               18 citations
,
  January 2018   in “Advances in experimental medicine and biology”    Hair keratins evolved from ancient proteins, diversifying through gene changes, crucial for forming claws and later hair in mammals.