61 citations,
April 2012 in “British Journal of Dermatology” Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.
61 citations,
July 2011 in “PLOS ONE” Spermidine may help reduce hair loss and deserves further testing as a treatment.
61 citations,
September 2010 in “Journal of Dermatological Science” Stress hormones and autoimmune reactions can cause hair loss.
59 citations,
August 2018 in “The oncologist” Some breast cancer patients still experience hair loss three years after chemotherapy, especially with taxane-based treatments.
57 citations,
June 2003 in “American Journal of Physiology-cell Physiology” Cyclosporin A helps mice grow hair by blocking a specific protein activity in skin cells.
56 citations,
July 2005 in “Experimental Dermatology” Injected human hair follicle cells can create new, small hair follicles in skin cultures.
55 citations,
November 2004 in “Expert opinion on drug safety” Chemotherapy often causes hair loss, nail changes, and mouth issues, but these are usually manageable.
53 citations,
June 1982 in “The BMJ” Cooling the scalp below 22°C before and during chemotherapy can help prevent hair loss.
52 citations,
May 2013 in “Supportive Care in Cancer” Scalp cooling significantly reduces hair loss in chemotherapy patients.
51 citations,
November 2005 in “Journal of Medical Primatology” Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.
50 citations,
September 2011 in “Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids” Maintaining the right amount of retinoic acid is crucial for healthy hair and skin.
50 citations,
October 2009 in “Clinical Endocrinology” Hair loss in young men linked to higher risk of insulin resistance and metabolic issues.
49 citations,
May 2013 in “JAMA Dermatology” Hair loss links to higher death risk from diabetes and heart disease; not a direct cause, but a marker for risk factors.
47 citations,
December 2019 in “Biomaterials” Scientists have created a new hair loss treatment using ultrasound to deliver gene-editing particles, which resulted in up to 90% hair regrowth in mice.
47 citations,
July 2005 in “British Journal of Dermatology” Topical vitamin D3 does not prevent hair loss from chemotherapy.
46 citations,
August 2019 in “Journal of the European Academy of Dermatology and Venereology” People with hair loss conditions experience more anxiety, depression, and a lower quality of life than those without these conditions.
45 citations,
December 2014 in “Journal of the European Academy of Dermatology and Venereology” Plasmacytoid dendritic cells are a key factor in causing hair loss in alopecia areata and could help differentiate it from other hair loss conditions.
41 citations,
January 2007 in “Journal of Korean Medical Science” Minoxidil and ATRA together boost hair growth more effectively than minoxidil alone.
39 citations,
January 2012 in “International Journal of Trichology” Melatonin solution helps treat hair loss in men and women.
38 citations,
September 2014 in “Cell and Tissue Research” The hair follicle infundibulum plays a key role in skin health and disease, and understanding it better could lead to new skin disease treatments.
36 citations,
April 2018 in “Journal of Investigative Dermatology” Macrophages help hair growth after injury through CX3CR1 and TGF-β1.
34 citations,
April 2008 in “Journal of the European Academy of Dermatology and Venereology” Skin problems like itching, dry skin, and hair loss are more common in hepatitis C patients after interferon treatment, but lichen planus is not linked to the infection.
32 citations,
July 2021 in “Journal of The American Academy of Dermatology” Hair loss from COVID-19 usually starts around 45 days after infection and lasts about 47.5 days.
32 citations,
June 2017 in “Journal of Pharmaceutical Sciences” Chitosan-coated nanoparticles improve skin delivery of hair loss treatments with fewer side effects.
31 citations,
September 2013 in “Stem Cells” Smad1 and Smad5 are essential for hair follicle development and stem cell sleepiness.
31 citations,
May 2012 in “European Journal of Dermatology” Menopause affects hair and skin; more research needed for treatment.
30 citations,
September 2016 in “BMJ” Taking 5-α reductase inhibitors for prostate enlargement or hair loss does not significantly raise the risk of erectile dysfunction.
30 citations,
January 2009 in “Nuclear Receptor Signaling” Hairless protein is crucial for healthy skin and hair, and its malfunction can cause hair loss.
28 citations,
May 2012 in “Veterinary Dermatology” Different types of dog hair loss are linked to problems starting the hair growth phase and early hair cycle ending.
28 citations,
July 2008 in “Developmental Biology” Smad4 is important for healthy hair follicles because it helps produce a protein needed for hair to stick together and grow.