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Research

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research Determination of the cuticula thickness of human and porcine hairs and their potential influence on the penetration of nanoparticles into the hair follicles

95 citations , January 2009 in “Journal of Biomedical Optics”

This study observed that particles sized 300-600 nm penetrate hair follicles more efficiently, likely due to alignment with the thickness of the human hair cuticula.

research Hair loss in older women: supplement to increase scalp hair thickness and reduce hair loss

January 2017 in “Nutrafoods - International Journal on Nutraceuticals, Functional Foods and Novel Foods”

This study found that a dietary supplement containing fermented soy, ornithine, arginine, and Tricovel® Tricoage45+ significantly reduced hair loss and promoted hair growth in menopausal women after 8 to 12 weeks.

research Mapping the hair density, thickness, and volume in normal and androgenetic alopecia subjects with the digital microscope

December 2022 in “JEADV Clinical Practice”

In this study, researchers found that using a handheld digital microscope, hair diameter was a better determinant of perceived alopecia severity in androgenetic alopecia than hair density.

research Hair regrowth following a Wnt- and follistatin containing treatment: safety and efficacy in a first-in-man phase 1 clinical trial.

16 citations , November 2011 in “PubMed”

This study found that a single intradermal injection of Hair Stimulating Complex significantly improved hair growth in men with androgenetic alopecia compared to placebo.

research Trichoscopic characteristics as diagnostic indicators for grading of female pattern hair loss severity in skin of color: A multicentric retrospective study by the International Dermoscopy Society

July 2026 in “Journal of Cutaneous and Aesthetic Surgery”

This study found that trichoscopic quantitative parameters reliably indicate the severity of female pattern hair loss and complement the Sinclair scale by offering a more objective and reproducible grading system.

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Community Join

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community can we talk about the effect of DHT on hair TEXTURE (not just thickness/density)

41 upvotes 1 month ago

Finasteride treatment improved hair texture and reduced frizz for some users, though full restoration of original texture may take time. Hair texture changes were noted across the head, with some areas responding faster to treatment.

community 5 months since I became obsessed with my hair

10 months ago

The user is experiencing hair regrowth and increased hair thickness after using supplements like biotin, zinc, selenium, and a complex with various natural ingredients, along with topical caffeine. They are considering using topical minoxidil and mesotherapy in the future.

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 3 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 Minoxidil to fix naturally receding temples/corners (NO actual hair loss)?

1 month ago

Minoxidil may not permanently fill naturally sparse hairline corners if no follicles exist there. If Minoxidil thickens existing hair, the cosmetic effect might improve, but stopping it could lead to shedding.

community 1 Month on Dutasteride (0.5mg) + Supplements – Seeing Thickness But No New Hairs Yet. Is That Normal?

in Is this regrowth? 83 upvotes 1 year ago

A 31-year-old woman is using Dutasteride (0.5mg daily) and supplements like a multivitamin, Herbadal, pumpkin seed oil, and vitamin D for genetic hair loss, noticing thicker hair but no new growth after one month. She is considering adding minoxidil and is aware of Dutasteride's risks, especially regarding pregnancy.

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Learn

7 / 801 results

learn Follistatin

glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

learn Osteopontin

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

learn Overview

learn Thymosin Beta 4

learn Clascoterone

How long does it take for clascoterone to show results on hair growth? Clascoterone is not approved for hair loss; it is investigational. In the trials reported so far, application was twice daily and increases in terminal hair count were reported at around 6 months, with more sustained change reported between 6 and 12 months.

learn Finasteride

Does hair strand thickness decrease in men with androgenic alopecia? Can finasteride help restore it? Androgenic alopecia thins hair strands by miniaturizing follicles. The pivotal finasteride trials (1,553 men, 1 mg/day, two years) report increased hair counts and improved assessed appearance, but they measured density, not the diameter of individual strands, so the effect on thickness itself is not established.

learn Low Level Laser Therapy

How many sessions of laser therapy are usually needed before noticing thicker hair? Visible improvement in hair thickness typically appears after three to six months of treatment.

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Clinics

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Experts

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas