July 2023 in “Clinical dermatology review” Intralesional triamcinolone acetonide is better than PRP for treating scalp alopecia areata, leading to faster and more complete hair regrowth.
December 2022 in “Himi, himijn tehnologijn hùrèèlèngijn èrdèm šinžilgèènij bùtèèl” Hair products with copper and zinc enriched yeast made hair thicker and denser.
April 2023 in “Acta Poloniae Pharmaceutica” Herbal extract shampoo increased certain minerals in hair and improved hair growth and scalp health.
7 citations
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August 2023 in “Skin Research and Technology” Scalp conditions change with age, affecting hair health.
10 citations
,
December 2010 in “British Journal of Dermatology” After menopause, some women lose scalp hair and gain facial hair, with patterns suggesting different underlying causes.
March 1997 in “Medical Molecular Morphology” Zinc deficiency causes early scalp hair damage that recovers slower than skin symptoms.
July 2024 in “Journal of Investigative Dermatology” Taxane chemotherapy can cause permanent hair loss by damaging hair follicles and altering their DNA.
2 citations
,
June 2020 in “Skin Research and Technology” MRI reveals thinner scalps and smaller hair follicles in people with androgenetic alopecia.
33 citations
,
April 2005 in “British Journal of Dermatology” Aging alone barely affects the number of hair follicles, meaning hair loss is minimal without other conditions like androgenetic alopecia.
3 citations
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February 2025 in “Journal of the American Academy of Dermatology” This study observed scalp hair parameter changes in transgender individuals over 24 weeks of gender-affirming hormone therapy. It found that masculinizing hormone therapy (MHT) with testosterone can lead to androgenetic alopecia (AGA), while feminizing hormone therapy (FHT) with estradiol and antiandrogens can improve hirsutism. The study highlights the role of sex steroids in influencing hair growth by affecting the hair cycle, with androgens shortening the anagen and telogen phases, and estrogens potentially prolonging anagen and inhibiting catagen.
2 citations
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April 2018 in “Journal of Cosmetic Dermatology” Tumescent fluid increases scalp hair angles, which may improve hair transplant results and reduce surgeon fatigue.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Aging causes changes in scalp cells that can negatively affect hair health.
47 citations
,
July 1967 in “Science” Not eating enough protein can cause hair roots to shrink and lose color, and hair to become thinner.
15 citations
,
January 1989 in “European Journal of Cancer and Clinical Oncology” 
Older women's scalp cells show changes that could contribute to hair thinning.
12 citations
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August 1988 in “Histopathology” The tumor likely shows dual neural crest differentiation.
46 citations
,
June 2018 in “American Journal of Clinical Dermatology” Hair loss is common in lupus patients and can be permanent or reversible, depending on the type, with various treatments available.
14 citations
,
December 2020 in “Journal of Investigative Dermatology” Aging causes changes in the scalp that can affect hair growth and lead to older-looking hair in women.
27 citations
,
May 2007 in “Archives of dermatological research” Diphencyprone treatment increases CD8 lymphocytes in the scalp, which is associated with hair regrowth in alopecia areata patients.
May 2026 in “Journal of Cutaneous and Aesthetic Surgery” Trichoscopy helps monitor changes and detect issues after hair transplants.
22 citations
,
May 2002 in “Skin Research and Technology” CE-PTG detects early hair follicle issues in balding areas, helping measure male hair loss.
January 2014 in “Journal of Pigmentary Disorders” Women's hair gets thinner and grayer as they age, with treatments available for hair loss and graying.
24 citations
,
April 2006 in “Journal of the American Academy of Dermatology” Heat shock protein 27 is more present in the active growth phase of human scalp hair follicles.
6 citations
,
November 2010 in “Histochemistry and cell biology” The proteins transthyretin and megalin are more present in the growth phase of hair, suggesting they might affect hair health and growth.
42 citations
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January 2011 in “Journal of Biomedical Optics” Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.
15 citations
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February 2003 in “British Journal of Dermatology” The study suggests computer-assisted analysis of scalp biopsies could improve hair loss diagnosis but needs more validation.
13 citations
,
July 2019 in “Dermatologic therapy” Stopping adalimumab and starting methotrexate with topical treatments improved the woman's scalp psoriasis and hair regrew.
10 citations
,
March 2015 in “PubMed” Scalp micropigmentation, a cosmetic tattoo technique, is a promising non-surgical treatment for hair and scalp deformities, despite potential complications.
2 citations
,
October 1985 in “Pediatrics in review” Scalp diseases change with age and can be hard to tell apart from hair disorders.
1 citations
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January 2013 in “International Journal of Physical and Social Sciences” Hair and nails can show long-term changes in lead and calcium levels.