August 2021 in “Asian Journal of Pharmaceutical and Clinical Research” Plant extracts in shampoo improved hair thickness and density in men with hair loss.
Hyaluronic acid in shampoo penetrated hair well, reduced frizz, and improved hair strength and moisture.
October 2015 in “Cosmetic Dermatology” Hair styling products and tools help improve hair's look and manageability but can damage hair if used incorrectly.
September 2020 in “Georg Thieme Verlag eBooks” The chapter discusses methods to improve hair growth in men.
March 2022 in “Hair transplant forum international” Using a special laser and growth serum can safely increase hair thickness and density in people with hair loss.
8 citations
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May 2020 in “International journal of biological macromolecules” Certain treatments can increase protein binding to natural hair but are less effective on permed hair.
September 2014 in “Hair transplant forum international” Galenic lotions can effectively treat different patterns of hair thinning in men and women.
January 2025 in “Dermatology Research and Practice” The treatment effectively repairs and strengthens damaged hair by restoring natural lipids.
July 2024 in “Journal of Dermatological Treatment” Botanical extracts and Minoxidil improved hair condition in a boy with a genetic disorder.
4 citations
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January 2015 in “Journal of drug assessment” Finasteride gel effectively and safely reduces hair thickness in women with excessive hair growth.
20 citations
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September 1987 in “The Lancet” January 2018 in “Elsevier eBooks” January 2015 in “Elsevier eBooks” 
54 citations
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June 1985 in “American Journal of Dermatopathology” Minoxidil helps grow longer, thicker hair in bald scalps of stumptailed macaques, and early treatment is more effective.
1 citations
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January 2010 in “Elsevier eBooks” 2 citations
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July 2012 in “PubMed” Ceramide-rich liposomes can effectively repair and strengthen damaged hair.
Sublingual minoxidil increases hair thickness in men with hair loss.
May 2024 in “Journal of cosmetic dermatology” Heat-treated Limosilactobacillus fermentum with menthol, salicylic acid, and panthenol promotes hair growth and balances scalp microbiome in people with androgenetic alopecia.
October 2025 in “Dermatology and Therapy” Nutrafol® nutraceuticals improve hair thickness and strength.
86 citations
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January 1996 in “Clinics in dermatology” Hair can be damaged by daily routines, but protein-based products can protect and improve it.
January 2012 in “한국미용학회지” Applying conditioner in the middle of a perm process reduces hair damage the most.
March 1996 in “Hair transplant forum international” Kevis P.F. may help with hair care when used with other products.
2 citations
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February 2016 in “Journal of sol-gel science and technology” A small molecule can strengthen fine hair, making it more resistant and natural-feeling.
March 2011 in “Focus on surfactants” Several companies launched new hair care ingredients in 2011 to improve conditioning, color retention, combability, and heat protection.
9 citations
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October 1947 in “The Lancet” 1 citations
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November 1947 in “The Lancet” 
March 2023 in “JIIS (Jurnal Ilmiah Ibnu Sina): ilmu farmasi dan kesehatan” The best biotin hair tonic formula has 20% span 80, 9.47% tween 80, and 5% PEG 400.
2 citations
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July 2021 in “Actas dermo-sifiliográficas/Actas dermo-sifiliográficas” Hair shaft disorders are diagnosed through examination and history, with general care and some treatments offering improvement.