TLDR  Ruby laser hair removal effectively reduces hair density and is preferred by most patients.   
  The study evaluated the efficacy of ruby laser-assisted hair removal in 88 patients treated monthly for 4 months, with hair density measured at 7 and 12 months post-treatment. Results showed an average hair density reduction of 13.7% at 1 year, which was statistically significant. Although only 44.3% of patients experienced reduced hair count at 1 year, 79.5% were satisfied with the treatment. The long-pulsed ruby laser was found to be effective in permanently removing a small proportion of unwanted dark-colored body hair, and patients preferred it over conventional methods due to its ability to slow hair growth, thin hair, and provide good temporary control. No adverse long-term side effects were observed.
            20 citations
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  April 1999   in “British journal of plastic surgery”
           20 citations
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  April 1999   in “British journal of plastic surgery”    Ruby laser hair removal significantly reduces hair density.  
      112 citations
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  July 1998   in “Journal of Investigative Dermatology”
           112 citations
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  July 1998   in “Journal of Investigative Dermatology”    Ruby laser pulses best destroy hair follicles during the growth phase and effectiveness varies with laser intensity; melanin is key for targeting, and timing treatments can improve results.  
      67 citations
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  October 1997   in “Dermatologic Surgery”
           67 citations
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  October 1997   in “Dermatologic Surgery”    The EpiLight Hair Removal System removed about 60% of hair with some side effects, and more research is needed to confirm long-term effectiveness.  
    
  
        
      June 2023   in “Clinical and Experimental Dermatology”
           June 2023   in “Clinical and Experimental Dermatology”    Gender-affirming hormone therapy changes hair growth in transgender people, with feminizing therapy reducing hair and masculinizing therapy increasing it, but sometimes additional treatment is needed.  
      April 2016   in “Journal of Aesthetic Nursing”
           April 2016   in “Journal of Aesthetic Nursing”    Men are increasingly removing body hair for looks and cleanliness, and while hair loss can cause distress, it doesn't affect their self-esteem as much as it does in women.  
               61 citations
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  January 2002   in “American Journal of Clinical Dermatology”                  6 citations
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  April 2000   in “European journal of plastic surgery”    Ruby laser hair removal effectively reduces hair density and is preferred by most patients.