October 2023 in “Animal production science” Vitamin A deficiency changes cattle hair structure, while pregnancy may improve it, suggesting hair can indicate cattle health.
May 2023 in “Animal Reproduction Update” High levels of cortisol in hair show long-term stress which can lower fertility in animals.
397 citations
,
February 2004 in “British Journal of Dermatology” Minoxidil boosts hair growth by opening potassium channels and increasing cell activity.
270 citations
,
March 2012 in “Dermatologic Surgery” Platelet-rich plasma can potentially promote hair growth by stimulating cell growth and increasing certain proteins.
219 citations
,
March 2004 in “Journal of The American Academy of Dermatology” 5% and 2% minoxidil solutions effectively promote hair growth and reduce hair loss, with 5% being slightly more effective but having more side effects.
210 citations
,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.
207 citations
,
April 2006 in “Journal of The American Academy of Dermatology” Iron deficiency may be related to hair loss, but there's not enough evidence to recommend iron screening or supplements for all hair loss patients.
192 citations
,
March 2017 in “Cell host & microbe” Hair follicle development and microbes help regulatory T cells gather in newborn skin.
162 citations
,
August 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” The new "differential stripping" method effectively measures how much substance gets into hair follicles.
118 citations
,
April 1998 in “Dermatologic Clinics” Finasteride and minoxidil are effective for hair regrowth, while treatments for alopecia areata have varying success and continuous treatment is necessary.
109 citations
,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production is closely linked to the active growth phase of hair in mice and may also influence hair growth itself.
94 citations
,
May 2011 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” Hair follicles greatly increase caffeine absorption through the skin shortly after it's applied.
91 citations
,
April 2011 in “Journal of Ethnopharmacology” Polygonum multiflorum extract helps grow hair by activating certain hair growth signals in mice.
90 citations
,
October 1996 in “Dermatologic Clinics” Growth factors are crucial for hair development and could help treat hair diseases.
79 citations
,
March 1999 in “The journal of investigative dermatology/Journal of investigative dermatology” Procyanidin compounds from grape seeds were found to significantly increase mouse hair growth.
66 citations
,
February 2015 in “Cell & tissue research/Cell and tissue research” The document concludes that there are no effective clinical treatments for hearing loss due to hair cell damage, but research is ongoing.
66 citations
,
June 2006 in “Journal of The American Academy of Dermatology” Finasteride increases hair weight and count in men with hair loss, with best results after four years.
63 citations
,
October 2013 in “Dermatologic Surgery” Platelet-Rich Plasma (PRP) increases the number of new hair follicles and speeds up hair formation.
62 citations
,
January 2013 in “Skin Pharmacology and Physiology” Low iron and vitamin D levels are linked to hair loss in women.
59 citations
,
November 2015 in “International Journal of Cosmetic Science” Oxidative stress damages hair and contributes to aging, and managing it can help maintain hair health.
58 citations
,
February 2016 in “Scientific reports” Blocking BACE1 and BACE2 enzymes causes hair color loss in mice.
54 citations
,
October 2002 in “Journal of controlled release” Medium lipophilic substances penetrate skin best, and adding ethanol can increase delivery to hair follicles.
53 citations
,
March 2014 in “Growth Hormone & IGF Research” IGF-1 injections help mice grow more hair by increasing cell growth and blocking a hair growth inhibitor.
52 citations
,
May 2017 in “Journal of Cosmetic Dermatology” PRP injections improve hair density and thickness in women with hair loss.
52 citations
,
October 2004 in “Veterinary dermatology” Melatonin and mitotane treatment led to hair re-growth in 62% of dogs with Alopecia X, but this was not always linked to normal hormone levels.
51 citations
,
May 2019 in “Biomaterials” Researchers developed a method to grow hair follicles using special beads that could help with hair loss treatment.
51 citations
,
May 2011 in “Phytotherapy Research” Ginseng, especially red ginseng, may help regrow hair and block a hair loss-related enzyme.
51 citations
,
January 2004 in “Domestic animal endocrinology” Melatonin implants and long daylight hours alter the timing of hormone release and hair growth in mouflon sheep.
50 citations
,
September 2016 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride for hair loss may cause persistent sexual symptoms, depression, anxiety, and lower quality of life.
49 citations
,
November 2014 in “Journal of Medicinal Food” Red Ginseng Extract may help human hair grow by activating growth pathways and blocking negative effects of certain hormones.