Some factors can either promote or inhibit hair growth.
Rapid weight loss can cause temporary hair loss, but hair usually grows back.
69 citations
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August 2016 in “PubMed” High stress can disrupt hair growth, but certain supplements might help.
August 2021 in “Journal of Investigative Dermatology” Stress causes hair loss by making the body produce cortisol, which stops hair cells from growing.
19 citations
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January 1997 in “Dermatologic Clinics” Most treatments for hair loss in 1997 were not effective for most people, and maintaining hair growth was difficult.
March 2026 in “Journal of Investigative Dermatology” Folliculin slows hair growth, and blocking it might help treat hair loss.
31 citations
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August 2000 in “Journal of Investigative Dermatology” Stem cells are key for hair follicle recovery.
March 2009 in “Dermatology Online Journal” Manipulating EGFR signaling may help treat hair loss and promote hair growth.
9 citations
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January 2018 in “BioMed Research International” Tetrahydroxystilbene Glucoside may help prevent hair loss by blocking certain pathways that lead to cell death.
8 citations
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June 2011 in “Nature Biotechnology” Stem cell treatments can potentially treat baldness, with one trial showing hair growth after injecting a hair-stimulating complex, and no safety issues were reported.
August 1994 in “Drugs & Therapy Perspectives” Some drugs can cause hair loss or growth, but hair usually returns to normal after stopping the drug.
July 2024 in “Journal of Investigative Dermatology” A peptide in shampoo can promote hair growth and improve hair condition.
1 citations
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February 2004 in “Medical Hypotheses” Certain cultural hair practices might cause baldness by affecting natural hair oils and stem cell delivery to hair follicles.
5 citations
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September 2018 in “Bioscience, Biotechnology, and Biochemistry” Thiosulfate may help hair grow faster in mice and works well with a common hair growth treatment.
1 citations
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October 2022 in “Annals of Translational Medicine” Cucurbitacin helps mice grow hair by blocking a protein that stops hair growth.
1 citations
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October 2025 in “Journal of Microbiology and Biotechnology” Natural extracts may promote hair growth with fewer side effects than conventional treatments.
September 2017 in “Journal of Investigative Dermatology” Certain products and treatments can improve hair health and growth.
April 2022 in “Biomedicine & Pharmacotherapy” CXCL12 protein slows down hair growth through its receptor CXCR4. Blocking this can potentially increase hair growth.
15 citations
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May 2002 in “PubMed” Hormones, especially DHT, affect hair loss and growth, and targeting specific enzymes may help treat hair loss.
147 citations
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April 1994 in “Drug Safety” Some drugs can cause hair loss or increase hair growth, but these effects are usually reversible when the drug is stopped.
August 2023 in “Dermatologic Surgery” Wounding may stimulate hair growth, but more research is needed to confirm the safety and effectiveness of related treatments.
194 citations
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November 2006 in “Science” A genetic mutation in the LIPH gene causes hair loss and growth defects.
24 citations
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April 2005 in “The Journal of Dermatology” Putting ketoconazole on the skin can help mice grow hair.
December 2020 in “Zenodo (CERN European Organization for Nuclear Research)” Certain herbs like stinging nettle, Indian gooseberry, and St. John's Wort can help improve hair growth and health.
January 2025 in “MEDS Public Health and Preventive Medicine” Spermidine supplements can help extend the hair growth phase and may be useful for treating hair loss.
14 citations
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December 2021 in “International journal of molecular sciences” Growth hormone levels affect hair growth and loss, with too much causing excess hair and too little leading to hair loss.
34 citations
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December 1991 in “Annals of the New York Academy of Sciences” The conclusion is that small hair follicles cause baldness in macaques, and treatments like antiandrogens and minoxidil can prevent hair loss and promote regrowth.
March 2007 in “International Society of Hair Restoration Surgery” Caffeine may help hair grow and manage hair loss.
7 citations
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May 2013 in “PubMed” A new hair loss treatment with two unique ingredients improved hair growth.
33 citations
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January 1997 in “Endocrinology” Testosterone can slow down hair growth when combined with certain cells from bald scalps, and this effect can be blocked by an androgen receptor blocker.