March 2021 in “International journal for research in applied science and engineering technology” Herbal hair dyes from tannin-rich plants are effective and safer than synthetic dyes.
April 2017 in “Journal of Pharmaceutical Investigation” Indole-based compounds improved ovarian health in rats with PCOS, with L-Tryptophan and Tryptophol being most effective.
June 2024 in “Archives of dermatological research” Dietary supplements might help prevent post-COVID hair loss, but serum ferritin is not a reliable indicator.
October 2015 in “Journal of the East Asian Society of Dietary Life” Curcuma longa L. may help reduce prostate inflammation.
40 citations
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May 2018 in “PubMed” Nutrafol® Women's Capsules safely and effectively promote hair growth in women with thinning hair.
The serum effectively promotes hair growth and reduces gray hair without side effects.
73 citations
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December 2015 in “Nature Genetics” Mutations in TBX3 cause horses to have more even hair color instead of Dun camouflage.
December 2014 in “Sociedad (University of Buenos Aires)” A hair loss supplement with green tea caused liver damage in three people.
Testosterone pellet therapy may better address hormone imbalances in aging by focusing on local hormone production and symptom relief.
August 2025 in “International Journal of Advanced Research in Science Communication and Technology” Advanced hair serums can improve hair growth, density, and texture.
July 2023 in “Zenodo (CERN European Organization for Nuclear Research)” Trazodone and chlorpromazine may help treat sexual dysfunction caused by finasteride and SSRIs.
January 2021 in “Research journal for veterinary practitioners” The document does not determine if essential fatty acids improve rabbit skin health.
February 2019 in “Americanae (AECID Library)” Selenium and zinc deficiency in sheep leads to thyroid and skin problems.
Combining oral and topical treatments improves hair growth more than using either alone.
December 2021 in “Ad-Dawaa' Journal of Pharmaceutical Sciences” Green tea and celery leaf extracts in hair tonic promoted hair growth in guinea pigs, with the best results at specific concentrations.
January 2013 in “Journal of Chengdu Medical College” Tolterodine Tartrate effectively treats overactive bladder symptoms.
November 2025 in “Dermatology and Therapy” The drinkable supplement increased hair growth and was safe for women with hair loss.
1 citations
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May 2019 in “International Journal of Applied Pharmaceutics” Both hair tonic and gel with Angiopteris evecta extract effectively stimulate hair growth.
13 citations
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March 1999 in “Biochemical Journal” Overexpressing SSAT in mice makes them highly sensitive to polyamine analogues, causing liver damage and high mortality.
October 2025 in “International Journal of Innovative Research in Technology” Personalized supplements are important for women's health, but hormone therapy can increase cancer and heart risks.
16 citations
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August 2000 in “Il Farmaco” Men have more tryptophan in their hair than women, and it increases with age and is higher in darker and grey or white hair.
8 citations
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January 2020 in “Skin appendage disorders” Saw palmetto supplements may modestly improve hair regrowth with few side effects, but more research is needed.
79 citations
,
April 1996 in “JAMA” Taking too many selenium supplements can cause serious health problems like hair loss and fatigue.
January 2026 in “Cell and Tissue Biology” TS-13 speeds up hair regrowth after chemotherapy without affecting treatment effectiveness.
November 2024 in “PubMed” The supplement improved hair density and was safe to use.
April 2019 in “Journal of the Endocrine Society” An over-the-counter vitamin/mineral supplement improved hair loss and blood sugar control in a woman with non-classic 11-hydroxylase deficiency.
10 citations
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January 2008 in “Biological and Pharmaceutical Bulletin” t-Flavanone may help hair growth by reducing a specific protein's activity in skin cells.
January 2023 in “Food and nutrition sciences” Most people using the supplement Renew saw health improvements, especially in sleep and energy, faster than with regular vitamins.
2 citations
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April 2016 in “Pharmaciana” Green tea and gotukola extract mix helps hair grow, with the best results from 5% green tea and 2.5% gotukola.
May 2026 in “SKIN The Journal of Cutaneous Medicine” The gummy supplement effectively promotes hair growth and is safe for women with hair thinning.