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research BH21 Segmented heterochromia with calibre change: an under-recognized sign of alopecia areata

June 2025 in “British Journal of Dermatology”

This case study describes an uncommon variant of coudability hair in alopecia areata, where intermittent inflammatory processes result in alternating bands of lighter color and reduced hair shaft calibre.

research Biology of the hair follicle and mechanisms of nonscarring and scarring alopecia

10 citations , June 2015 in “Seminars in cutaneous medicine and surgery”

This review discusses the biology of hair follicles and mechanisms behind various hair disorders, but it presents no new findings; the authors emphasize understanding these concepts to inform treatment development.

research 4 Hair Follicle Physiology and Mechanisms of Hair Disorders

October 2022 in “Hair Transplantation”

This chapter reviews the basic physiology and causal mechanisms of hair follicle disorders, but it reports no new clinical results.

research Three‐dimensional imaging and analysis of the surface of hair fibres using scanning electron microscopy

14 citations , July 2007 in “International Journal of Cosmetic Science”

This study found that a new 3D image analysis method from SEM images enables quick and accurate measurement of cuticle scale heights in hair fibers.

research Segmental heterochromia with calibre change: a rare sign of alopecia areata

June 2026 in “Clinical and Experimental Dermatology”

In this study, researchers observed a rare presentation of alopecia areata characterized by hair shafts with segmental heterochromia and changes in thickness, indicating a fluctuating low-level inflammatory process with recovery periods in the hair's normal characteristics.

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Community Join

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community Discussion on Finasteride and life.

in Chat 166 upvotes 1 year ago

Finasteride can aid hair regrowth but may cause side effects like depression and sexual dysfunction. Users discuss experiences with finasteride, minoxidil, and RU58841, highlighting varied responses and the importance of informed treatment choices.

community I use Hair Fibres pretty much everyday, is that okay?

in Product 12 upvotes 1 year ago

Using hair fibers daily is generally fine, but it's important to choose a quality keratin-based product to avoid scalp irritation. The user combines hair fibers with a regimen of finasteride, minoxidil, microneedling, and ketoconazole.

community Best brand of hair fibres to buy?

6 upvotes 1 week ago

A user in the UK is seeking recommendations for hair fibers. Nanogen is suggested as a good brand.

community Will it look smooth if I start using hair fiber on the thining corners, on top of minoxidil?

15 upvotes 6 days ago

The conversation discusses using hair fibers on thinning corners and considers treatments like minoxidil, finasteride, and dutasteride for hair loss. Users suggest finasteride and dutasteride for regrowth, with some recommending hair concealers over fibers for a smoother look.

community 5 months in using rogaine foam 5%.

in Progress Pictures 15 upvotes 5 months ago

The user has been using 5% minoxidil foam for 5 months with noticeable results and is considering adding finasteride. Suggestions include adding finasteride, using hair fiber spray, and trying microneedling for better results.

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Learn

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learn Hair Fibers

Do hair fibers wash out easily, or do you need a special shampoo to remove them? There is no published trial comparing shampoos for removing hair fibers. Because the fibers cling by static rather than bonding chemically, and because users consistently report they rinse out with ordinary shampoo, the specialist fiber-removal shampoos do not appear to be necessary; a clarifying shampoo may help when fibers are layered under hairspray or gel.

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Clinics

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Experts

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas