10 citations
,
  January 1994      Hair can be straightened using different chemicals, not just strong alkali.  
     
           47 citations
,
  January 2017   in “RSC Advances”    Keratin peptides can change hair shape gently without harsh chemicals.  
     
           October 2001   in “WORLD SCIENTIFIC eBooks”    Many substances, including chemicals and metals, can cause skin reactions; careful handling and identification of allergens are crucial to prevent dermatitis.  
     
           208 citations
,
  December 2003   in “Journal of Investigative Dermatology”    Certain cells from hair follicles can create new hair and contribute to hair growth when implanted in mice.  
     
           19 citations
,
  January 2009   in “International review of cell and molecular biology”    Hair's strength and flexibility come from its protein structure and molecular interactions.