November 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Mesenchymal stem cells from bone marrow and umbilical cord can help regenerate hair follicles.
Microvascular free scalp flap transfer is an effective method for hair restoration.
October 2009 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Researchers developed a method to label and study human hair follicle stem cells using a fluorescent protein.
May 2009 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” PPARgamma is crucial for healthy hair follicles, and its loss causes scarring alopecia.
March 2009 in “The Journal of Urology” Low dose finasteride causes only minor changes in PSA levels in men over 50 with BPH.
June 2008 in “Experimental Dermatology” 17-beta estradiol and prednisolone may help regrow hair damaged by chemotherapy.
March 2007 in “Journal of hypertension” Minoxidil effectively lowers blood pressure in patients with resistant hypertension.
January 2006 in “Atherosclerosis Supplements” 
January 2005 in “Seibutsu Butsuri/Seibutsu butsuri” Chemical treatments damage hair more than UV exposure, making it thinner and less flexible.
January 2003 in “Dermatology” 
January 2001 in “Biomedical Research” THH and PAD type III appear together early in hair growth, but deiminated THH appears later, suggesting another factor is involved.
January 1998 in “Dermatology” June 1996 in “Journal of Dermatological Science” August 1994 in “Journal of Dermatological Science” 
January 1981 in “The Journal of Toxicological Sciences” Hydrocortisone 17-butyrate 21-propionate ointment caused reversible side effects like skin issues, weight gain, and organ changes in dogs.
January 2021 in “Elsevier eBooks” hiPSCs can help regenerate hair follicles and treat hair loss.
September 2016 in “Journal of Dermatological Science” The protein aPKCλ is crucial for keeping hair follicle stem cells inactive and for hair growth and regeneration.
August 2016 in “Journal of Investigative Dermatology” 
October 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Scientists used a special imaging technique to observe that hair follicle regeneration involves cell division and structural changes, mostly in the lower part of the follicle, and that the dermal papilla at the base is crucial for regrowth.
June 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Prostaglandin D2, found in higher levels in bald scalps, stops hair growth and could be a target for treating hair loss.
8 citations
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January 2012 in “JIMD reports” A new mutation in the AGPAT2 gene causes severe fat tissue loss and related health issues by reducing the protein's levels.
7 citations
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January 2013 in “The journal of investigative dermatology/Journal of investigative dermatology” T-cell reconstitution after thymus transplantation can cause hair whitening and loss.
408 citations
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January 2017 in “Science” Some wound-healing cells can turn into fat cells around new hair growth in mice.
268 citations
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April 2009 in “International Journal of Pharmaceutics” Niosomes improve minoxidil skin delivery for hair loss treatment.
212 citations
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September 2015 in “Journal of Investigative Dermatology” The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.
154 citations
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October 1996 in “Proceedings of the National Academy of Sciences of the United States of America” Estrogen affects hair growth and skin cell multiplication.
113 citations
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November 2017 in “Scientific Reports” Tiny particles from stem cells help activate hair growth cells and encourage hair growth in mice without being toxic.
54 citations
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December 2014 in “Wound Repair and Regeneration” PRP injections may improve hair thickness and density in female hair loss patients.
54 citations
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May 1998 in “Urology” Men with enlarged prostates often have more severe baldness.
51 citations
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April 2020 in “Cells” Special cell particles from macrophages can help hair grow.