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Glossary Hair Diameter Measurement

process of determining width of individual hair strand

Hair Diameter Measurement, also known as Hair Thickness Measurement or Hair Width Measurement, refers to the process of determining the width of an individual hair strand. This measurement is typically done using tools like a micrometer or specialized imaging techniques. It is important for understanding hair health, diagnosing conditions like alopecia, and tailoring hair care treatments.

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Research

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research Hair diameter measurements for planning follicular unit extraction surgery (FUE): Is there a correlation between the micrometer caliper and scanning electron microscopy (SEM) findings?

3 citations , April 2021 in “Journal of Cosmetic Dermatology”

In this study, the researchers found that a manual micrometer caliper is a reliable tool for planning hair transplant surgery and accurately measures the short axis of the hair shaft.

research Hair diameter measurement methods: micrometer caliper versus phototrichogram

2 citations , April 2023 in “Archives of Aesthetic Plastic Surgery”

This study found that measuring hair thickness with a phototrichogram provided significantly thicker readings than using a micrometer caliper, suggesting that the phototrichogram may be more clinically useful for evaluating hair in patients undergoing hair transplantation.

research Quantitative measurement of hair diameter diversity as a diagnostic indicator of androgenetic alopecia in Korean males: A cross-sectional study

February 2024 in “JAAD International”

Measuring the variety in hair thickness can help diagnose male pattern baldness in Korean men.

research Objective Hair Shaft Diameter Measurement From Trichoscopic Images Using Intensity Profile Analysis

August 2026 in “Cureus”

This technical report outlines a new standardized method using Fiji (ImageJ) to objectively measure hair shaft diameter from trichoscopic images, demonstrating successful analysis in a single-image proof-of-concept study.

research Quantitative Studies on Human Hair Growth(II). Correlation between Subjective Grading and Objective Measurements of Hair Growth.

2 citations , January 1994 in “Journal of S C C J”

This study found that objective measurements of hair growth, such as hair growth rate and diameter, can provide a more accurate evaluation of androgenic alopecia than subjective grading alone.

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Community Join

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community Seeking Suggestions for VEGF Gene Therapy in Hair Transplants

in Research 112 upvotes 5 months ago

A user is exploring VEGF gene therapy to enhance hair transplant results, considering measuring hair shaft diameter and growth rate. Suggestions include using phototrichograms and possibly adding PRP, though its effectiveness is uncertain.

community Taking Charge of Your Hair: The "Big 3 Stack" Explained for 2023

129 upvotes 3 years ago

The "Big 3 Stack" for hair loss treatment, which includes Minoxidil for hair density improvement, Ketoconazole shampoo for enhancing hair volume and thickness, and Finasteride for blocking hair loss causing hormones. Microneedling can boost Minoxidil's effects.

community Ultimate DHT/finasteride microdosing graph to replace the commonly one referenced on forums

202 upvotes 5 years ago

Hair loss treatments, specifically, discussing the effectiveness and side effects of finasteride, minoxidil, and RU58841 in various microdoses. It also includes an updated graph which provides information on how different doses affect DHT levels, scalp skin and serum androgen levels, as well as hair count.

community Highly recommend buying a microscope (see pictures)

in Treatment 44 upvotes 8 months ago

A user recommends using a microscope to assess hair density and track hair loss progress, finding it useful for evaluating treatment effectiveness, particularly with dutasteride and minoxidil. They advise against obsessing over hair loss and emphasize focusing on other meaningful life aspects.

community Amplifica: Hope or Cope? A Review of Their Pipeline

9 upvotes 1 month ago

Amplifica's AMP-303 showed a modest increase in hair growth, but results were inconsistent and potentially misleading. Hyaluronic acid and osteopontin are being explored for hair growth, with varying effects on different hair types and conditions.

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Learn

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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 Fluridil

Can daily Fluridil application stop hair follicle miniaturization? The single published fluridil trial (43 men; placebo-controlled for 3 months, then all on fluridil to 9 months) reported more hairs in the growth phase, but it never measured follicle diameter and has not been replicated — so whether daily use stops miniaturization is unproven, and community users describe stabilization rather than regrowth.

learn Caffeine

Stimulant used in hair shampoos and lotions

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