3 citations
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June 2017 in “Journal of Biomaterials Applications” Keratin extract from human hair was found to promote hair growth in mice.
September 2005 in “Journal of Investigative Dermatology” Ferulic acid helps stabilize vitamins C and E for better skin protection from the sun, certain compounds may promote hair growth, atopic dermatitis patients have lower skin defense molecules, older men are more likely to get a type of skin cancer, and a substance called relaxin may prevent age-related skin thickening.
27 citations
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January 2015 in “International Journal of Trichology” The supplement helps improve hair growth and reduce hair shedding.
The hair masks are safe, stable, and effective for hair care.
September 2025 in “OPAL (Open@LaTrobe) (La Trobe University)” SELP::KP improves hair strength, elasticity, and health, making it a promising hair cosmetic.
July 2024 in “Journal of Investigative Dermatology” Propolis extract can promote hair growth and increase keratin production.
16 citations
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August 1989 in “PubMed” Retinol and L-cystine improve diffuse hair loss without side effects.
March 2026 in “International Journal of Cosmetic Science” Pal-KCV peptide strengthens hair and reduces breakage by up to 52%.
November 2024 in “PubMed” The supplement improved hair density and was safe to use.
June 2020 in “Journal of Investigative Dermatology” Certain bacteria can enhance skin regeneration.
1 citations
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January 2017 in “PubMed” All five hair fiber products improved appearance but didn't stick to completely bald areas.
1 citations
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August 2021 Instagram ads for skin, hair, and nail supplements often make broad health claims without clear ingredient information, and are not FDA-regulated.
May 2026 in “International Journal of Cosmetic Science” A plant-based treatment from Avena strigosa seeds effectively repairs and strengthens damaged hair.
December 2023 in “Chiwi'saeng'gwa haghoeji” Hair keratin protein might help heal mouth wounds faster.
December 2025 in “PubMed” Fish collagen peptide may boost hair growth and health.
2 citations
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January 2020 Certain dietary supplements can improve hair health.
5 citations
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September 2017 in “Journal of Cosmetic Dermatology” A marine protein-based dietary supplement can safely boost hair growth and reduce hair loss in people with thinning hair.
January 2010 in “Pharmacy Today” Collagen reduces skin melanin, boosts antioxidants, and improves skin moisture.
January 2017 in “Nutrafoods - International Journal on Nutraceuticals, Functional Foods and Novel Foods” The supplement reduces hair loss and increases hair thickness in older women.
November 2020 in “Research Square (Research Square)” Keratin injections in mice can stimulate hair growth and might help treat hair loss.
January 2023 in “Italian journal of dermatology and venereology” The supplement effectively improved hair growth and reduced hair loss safely.
12 citations
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October 2015 in “Journal of bioactive and compatible polymers” Keratin hydrogel from human hair is a promising biocompatible material for soft tissue fillers.
4 citations
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September 2012 in “Journal of dermatological science” The hair follicle's connective tissue is a key source of a certain collagen in human scalp skin.
A diet of collagen and vinegar improved hair growth and scalp health in women aged 40-60 more effectively than collagen alone.
Coconut and castor oils may naturally boost hair growth by increasing keratin.
8 citations
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September 2021 in “Journal of Cosmetic Dermatology” Some diets and supplements might help with skin disorders, but their effectiveness varies and more research is needed.
July 2025 in “JAAD Case Reports” 11 citations
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August 2021 in “Aging” Collagen and TGF-β2 help maintain hair cell shape and youthfulness.
12 citations
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October 2007 in “PubMed” Keratin helps protect and strengthen hair, reducing damage and color fading.
September 2023 in “Journal of microbiology and biotechnology” A type of collagen helps hair grow by boosting cell growth and activating a specific hair growth pathway.