TLDR  A gluten-free diet does not help hair regrowth in celiac disease patients with alopecia areata.   
  The study by Bondavalli et al. (1998) concluded that a gluten-free diet was ineffective in treating alopecia areata associated with celiac disease. Despite adherence to the diet, patients did not experience significant hair regrowth, indicating that other factors might be involved in the pathogenesis of alopecia areata in celiac disease patients. This finding suggested that alternative therapeutic approaches should be considered for managing hair loss in these individuals.
            46 citations
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  May 1997   in “British journal of dermatology/British journal of dermatology, Supplement”
           46 citations
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  May 1997   in “British journal of dermatology/British journal of dermatology, Supplement”    Vitiligo is not linked to coeliac disease, but a small number of alopecia areata patients may have it, suggesting they should be tested for coeliac disease.  
    
  
        
        99 citations
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  July 2017   in “Clinical Reviews in Allergy & Immunology”
           99 citations
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  July 2017   in “Clinical Reviews in Allergy & Immunology”    New treatments for Alopecia Areata show promise but need to be more effective and affordable.  
      1 citations
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  July 2023   in “Al-Azhar Medical Journal”
           1 citations
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  July 2023   in “Al-Azhar Medical Journal”    Higher antigliadin antibodies are linked to more severe alopecia areata, suggesting screening for celiac disease in these patients.  
      January 2022   in “Al-Azhar Medical Journal”
           January 2022   in “Al-Azhar Medical Journal”    Higher antigliadin antibody levels are linked to alopecia areata severity.  
      17 citations
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  January 2020   in “Skin appendage disorders”
           17 citations
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  January 2020   in “Skin appendage disorders”    Certain diets may help with hair growth in people with different types of hair loss.  
               132 citations
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  April 2005   in “Gastroenterology”    A gluten-free diet significantly improves skin and health issues in people with dermatitis herpetiformis, a skin condition linked to celiac disease.