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research When Microneedling Backfires: A Hidden Risk of Hair Shaft Fragility in AGA Patients

January 2026 in “Journal of Cosmetic Dermatology”

This study observed that repeated low-depth microneedling in patients with androgenetic alopecia led to initial hair improvement but subsequently caused hair-shaft fragility and breakage, suggesting iatrogenic damage.

research Prognosis and Management of Congenital Hair Shaft Disorders with Fragility—Part I

33 citations , June 2016 in “Pediatric Dermatology”

This review examines hair shaft disorders, reporting limited evidence for treatments like minoxidil and oral retinoids, and emphasizes gentle hair care and genetic counseling for managing congenital cases.

research Prognosis and Management of Congenital Hair Shaft Disorders without Fragility—Part II

14 citations , June 2016 in “Pediatric Dermatology”

This review discusses the prognosis and treatment options for hair shaft disorders, finding no studies but suggesting some disorders improve with specific treatments like minoxidil and retinoids, while gentle hair care remains essential.

research Diffuse congenital hypotrichosis simplex with associated hair shaft fragility

1 citations , October 2021 in “Australasian Journal of Dermatology”

This letter to the editors describes a case of diffuse congenital hypotrichosis simplex with associated hair shaft fragility but reports no new clinical findings.

research Hair care practices and structural evaluation of scalp and hair shaft parameters in African American and Caucasian women

25 citations , August 2015 in “Journal of cosmetic dermatology”

This study observed significant differences in hair care practices and biologic hair parameters between Caucasian and African American women, which may contribute to varying hair fragility and growth.

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Learn

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learn Hair Multiplication

extract, clone, and reinsert your own hair cells

learn Cetirizine

How does cetirizine reduce inflammation linked to hair loss? Cetirizine is proposed to lower prostaglandin D2 and raise prostaglandin E2 around hair follicles; three small trials of a compounded 1% topical report modest increases in hair density and shaft thickness, with minoxidil doing better head-to-head. Topical cetirizine is off-label and unapproved for hair loss, and the evidence is too thin to call it effective or safe.

learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Adenosine

nucleoside used for hair regrowth stimulant properties

learn Valproic acid

an anticonvulsant repurposed for hair loss via histone inhibition

learn Stemoxydine

chemical from L'Oreal that encourages hair to enter growth phase

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Community Join

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community Hair Shaft Diameter and Density Comparison

13 upvotes 1 month ago

The conversation discusses differences in hair shaft diameter and density between thinning and denser areas on the scalp. Treatments mentioned include Minoxidil, finasteride, and dutasteride.

community FDA Policy Shift Explained: What It Actually Means for PP405, VDPHL-01, Breezula and Hair Loss Drug Timelines

in Research/Science 42 upvotes 7 months ago

The FDA policy change may speed up approval for hair loss drugs like PP405, VDPHL-01, and Breezula by potentially eliminating the need for a second confirmatory Phase 3 trial. Approval timelines could be as early as 2028 for some treatments if Phase 3 results are strong.

community Recent trials investigating mesenchymal stem cell derived exosomes demonstrate significant increases in anagen duration and hair shaft caliber by upregulating Wnt/beta-catenin pathways.

4 upvotes 4 weeks ago

Exosomes from mesenchymal stem cells can increase hair growth by enhancing anagen duration and hair shaft thickness through the Wnt/beta-catenin pathway. Phase 2 trials show improved hair counts over 24 weeks.

community Microneedling must reach the stem cells in the upper hair shaft

82 upvotes 4 years ago

Microneedling should target depths of 0.5mm to 1.5mm for hair loss, with weekly sessions at 1mm recommended. Combining microneedling with Minoxidil is common for improved results.

community After using finasteride, did you notice an improvement in the hair shaft in terms of looking more “alive” and shiny?

2 upvotes 7 months ago

Finasteride users reported improvements in hair appearance, including increased thickness, shine, and darker color. Some users noticed their hair looked healthier and less sunburned after starting the treatment.

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas