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.
October 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Six new genes linked to early hair loss were found, which also surprisingly connect to Parkinson's disease and lower fertility.
16 citations,
October 2012 in “British Journal of Dermatology” Chemotherapy can cause significant hair thinning and changes in hair texture, while tamoxifen has a smaller effect.
4 citations,
May 2023 in “JAAD case reports” Hyaluronic acid fillers for temporal lifting can cause hair loss without scarring.
October 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Thymic peptides can either promote or inhibit human hair growth.
October 2022 in “International journal of research and review” A man had severe stomach issues after a dental treatment with Formacresol, which improved with a different medication.
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.
124 citations,
November 2000 in “The journal of investigative dermatology/Journal of investigative dermatology” PAD3 plays a key role in hair and skin protein structure and may be linked to skin diseases.
5 citations,
June 2016 in “JAMA Dermatology” People with hair loss should use strong sun protection to prevent scalp skin cancer.
October 2017 in “The American journal of gastroenterology” Three patients suffered severe health issues due to not getting enough vitamins and minerals after weight-loss surgery.
1 citations,
July 2017 in “Skin Appendage Disorders” A woman developed permanent hair loss after a face-lift surgery despite various treatments.
December 2015 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Finasteride, a hair loss treatment, may cause long-term sexual dysfunction and depression.
June 2023 in “Journal of cosmetic dermatology” A woman developed skin lesions after PRP injections, possibly linked to COVID-19 infection and vaccination.
1 citations,
September 2023 in “Dermatology and Therapy” Baricitinib helps improve hair growth in severe alopecia, with better results in less severe cases and higher doses working faster.
April 2023 in “Clinical dermatology review” COVID-19 infection may cause hair loss.
May 2024 in “Journal of ayurveda and integrated medical sciences” Amra Beej Majja Churna may help improve Vitamin B12 levels and symptoms in vegans.
August 2023 in “British Journal of Surgery” Synthetic hair transplants can lead to skin cancer on the scalp.
January 2023 in “Skin appendage disorders” Hair transplants in male pattern baldness typically look normal under a microscope.
April 2022 in “DOAJ (DOAJ: Directory of Open Access Journals)” Effective hair regrowth after COVID-19 involves psychological support, good nutrition, and hair growth treatments.
February 2014 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
September 2016 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Once-daily 5% minoxidil foam increases hair regrowth and density in women with hair loss, but not as effectively as twice-daily 2% minoxidil solution, though it's safer and more convenient.
January 2023 in “Skin appendage disorders” Hair restoration surgery can change the appearance of hair when examined with a special magnifying tool.
July 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” New treatment with Wnt proteins and growth factors safely increases hair thickness.
3 citations,
March 2018 in “European Urology Supplements” Using 5-alpha-reductase inhibitors may improve bladder cancer survival in men.
June 2006 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” A simple method using the wash test and dermatoscopy can help differentiate between two hair loss conditions, androgenetic alopecia and chronic telogen effluvium.
December 2021 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Topical finasteride is promising for hair loss with minimal side effects but needs more research and approval.
March 2022 in “medRxiv (Cold Spring Harbor Laboratory)” People with blood group O may have a higher risk of developing post-COVID-19 syndrome.
1 citations,
October 2022 in “Cureus” Over half of the participants in a Saudi Arabian survey experienced hair loss after COVID-19, affecting women and younger people more, with a small percentage feeling a severe impact on their lives.
January 2006 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
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.