June 2013 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” FGF9 from certain cells can trigger new hair growth during wound healing, but humans have fewer of these cells, which may limit hair regrowth.
January 2011 in “Journal of Society of Cosmetic Chemists of Japan” 18-MEA and SPDA can restore damaged hair's smoothness and reduce frizz.
September 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Scientists successfully created fully functional hair follicles using bioengineering methods and stem cells.
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.
May 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Prostaglandin D2, found in higher levels in bald scalps, stops hair growth, suggesting that blocking its receptor could potentially treat hair loss.
January 2011 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Bald men with male pattern baldness still have hair stem cells, but lack certain cells needed for hair growth.
Alopecia areata, a type of hair loss, may be passed through T cells and has genetic links, while treatments vary in effectiveness. Male pattern baldness can be treated with finasteride and is influenced by androgens in hair follicles.
23 citations,
May 2010 in “Surface and interface analysis” Chemical treatments and UV radiation severely damage the lipid layer on hair.
1 citations,
June 2018 in “The Journal of Dermatology” A man got heart infection from scalp infection caused by artificial hair implants.
22 citations,
August 2015 in “PloS one” Keratin from hair binds well to gold and BMP-2, useful for bone repair.
3 citations,
June 2013 in “Journal of Dermatology” Hairpieces improve quality of life for women with hair loss.
April 2023 in “Journal of Investigative Dermatology” Blocking casein kinase 1 in skin cells can help melanocyte precursors move better, potentially helping with conditions like vitiligo or gray hair.
November 2023 in “ACS Applied Polymer Materials” The new method extracts keratin from hair faster and better, and the resulting product improves blood clotting and wound healing, with potential for personalized treatments.
August 2019 in “Journal of Dermatology” Woman with diabetes had hair loss due to rare ovarian tumor; surgery improved hair growth.
January 2013 in “The Nishinihon Jourrnal of Dermatology” 
64 citations,
January 2005 in “International Journal of Dermatology” Hair transplant destroyed by lichen planopilaris.
23 citations,
March 2001 in “Clinics in Dermatology” Hair restoration surgery techniques have evolved, with focus on patient selection and realistic goals, and future advancements may include cloning and gene therapy.
19 citations,
May 2010 in “Surface and interface analysis” 18-MEA is essential for hair's water resistance, and a conditioner with 18-MEA and SPDA can restore it.
17 citations,
October 2002 in “Dermatologic Surgery” Successful surgical hair restoration requires careful planning, precise execution, and proper aftercare, using techniques like follicular unit transplantation and correct hair angling for best cosmetic results.
13 citations,
September 2002 in “Dermatologic Surgery” Effective repair of bad hair transplants requires skilled techniques and careful use of donor hair, with strategies like reimplantation and camouflage, and new methods to minimize scarring.
8 citations,
January 2015 in “Experimental Dermatology” Dr. Shoji Okuda's pioneering work on hair transplantation was overlooked and could have significantly advanced the field if recognized sooner.
8 citations,
January 2018 in “European journal of dermatology/EJD. European journal of dermatology” The girl's regrown brown hair had less of certain pigments than her original black hair.
3 citations,
January 2006 in “Dermatologic Surgery” The International Society of Hair Restoration Surgery established a curriculum in 2005 to standardize knowledge and skills for treating hair loss, emphasizing it as a multidimensional specialty.
2 citations,
June 1997 in “The American Journal of Cosmetic Surgery” Hair transplant megasessions are safe up to 1500 grafts but larger sessions have more risks and challenges.
June 2008 in “Dermatologic Surgery” The International Society of Hair Restoration Surgery created a standard curriculum in 2008 to guide doctors in diagnosing and treating hair loss effectively.
October 2002 in “Dermatologic Surgery” The document concludes that careful planning, efficient use of every hair graft, and setting surgical priorities are crucial for successful hair restoration surgery.
September 2002 in “Dermatologic Surgery” The best results in surgical hair restoration come from careful techniques, optimal use of limited hair supply, correct hair direction, saving hair for key areas, understanding scarring effects, and adjusting hair graft density.
January 2019 in “日本皮膚科学会雑誌” 
27 citations,
January 2008 in “Journal of Cutaneous and Aesthetic Surgery” Modern hair restoration techniques have evolved from punch grafting to methods like micro-grafting and follicular unit transplantation, but they are labor-intensive, expensive, and can lead to patient dissatisfaction. Future treatments may involve cloned hair follicles and drugs like finasteride.
August 2023 in “International Journal of Cosmetic Science” Rosemary extracts, specifically compounds like rosmarinic acid and carnosic acid, can protect hair from UV damage.