June 2026 in “Dermatology and Therapy” GLP-1RAs, like semaglutide and tirzepatide, may cause hair loss, so patients should be informed and monitored.
April 2016 in “The journal of investigative dermatology/Journal of investigative dermatology” M2 macrophages help hair regrowth in wounds by making growth factors.
256 citations
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October 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Growing human skin cells in a 3D environment can stimulate new hair growth.
120 citations
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November 2014 in “Biological Reviews” The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.
1 citations
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December 2016 in “Trichology and cosmetology:” Panax ginseng might help with hair growth and has fewer side effects than synthetic treatments.
64 citations
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March 2005 in “Journal of Investigative Dermatology” Brain-Derived Neurotrophic Factor (BDNF) slows down hair growth and promotes hair follicle regression.
47 citations
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May 1995 in “Journal of Investigative Dermatology” Hair follicles in people with alopecia have lower levels of a key blood vessel growth protein.
19 citations
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May 2020 in “Cells” Substance from human umbilical cord blood cells promotes hair growth.
8 citations
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April 2023 in “Cureus” Stem cells could be a better treatment for hair loss by reactivating dormant hair follicles.
200 citations
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November 1997 in “Planta” Calcium affects where root hairs grow, but other unknown factors determine their growth direction.
108 citations
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July 2004 in “American Journal of Pathology” Stress increases a factor in mice that leads to hair loss, and blocking this factor may prevent it.
105 citations
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May 2011 in “The journal of investigative dermatology/Journal of investigative dermatology” Activating TRPV3 stops human hair growth.
26 citations
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January 2016 in “Annals of Dermatology” Ecklonia cava polyphenols help increase human hair growth and reduce hair loss.
25 citations
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June 2004 in “Journal of Investigative Dermatology” Macrophage-stimulating protein helps hair grow and can start hair growth phase in mice and human hair samples.
11 citations
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October 2020 in “Plant biotechnology journal” Overexpressing SIMK in alfalfa boosts root hair growth, nodule clustering, and shoot biomass.
6 citations
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October 2018 in “PLoS ONE” Stress can slow hair growth and affect skin color by impacting the body's stress response system.
April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” A gene network led by RSL4 is crucial for early root hair growth in response to cold in Arabidopsis thaliana.
July 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Chitosan slows root hair growth and causes a buildup of callose at low concentrations, but at high concentrations, it only inhibits growth without callose buildup.
July 2024 in “Frontiers in Pharmacology” Pilose antler extracts help hair growth by activating hair follicle stem cells.
January 2020 in “JoLS Journal of Life Sciences” Red onion and Angelica gigas extracts promote hair growth and improve hair health.
82 citations
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September 2018 in “Nature Communications” A certain smell receptor in hair follicles can affect hair growth when activated by a synthetic sandalwood scent.
27 citations
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June 2023 in “Nature” Senescent melanocytes can boost hair growth by activating hair stem cells.
18 citations
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January 2007 in “Pharmaceutical Biology” Citrullus colocynthis extract is effective for hair growth, comparable to minoxidil.
9 citations
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April 2019 in “International Journal of Molecular Sciences” Kojyl cinnamate ester derivatives can promote hair growth by increasing adiponectin production in fat tissues.
January 1974 in “Nippon Nōgei Kagakukaishi/Nihon Nougei Kagakkaishi” Applying L-methionine and L-serine to the skin promotes the most hair growth.
22 citations
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June 2012 in “PLOS ONE” Cholesterol-related compounds can stop hair growth and cause inflammation in a type of scarring hair loss.
157 citations
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April 1994 in “Clinical endocrinology” Androgens can cause hair growth in some areas and hair loss on the scalp.
76 citations
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April 2013 in “PLoS ONE” Chronic stress can cause hair loss by increasing oxidative stress, but antioxidants may help.
36 citations
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January 2014 in “Evidence-based Complementary and Alternative Medicine” Pumpkin seed oil helps hair growth in men with hair loss.
15 citations
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January 2016 in “Biological & Pharmaceutical Bulletin” Bee venom helps hair grow and may work better than some common treatments.