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GlossaryAnagen Hair Ratio

proportion of hair follicles in the active growth phase

The Anagen Hair Ratio refers to the proportion of hair follicles that are in the anagen phase, which is the active growth phase of the hair cycle. A higher anagen hair ratio indicates a greater number of hair follicles are actively growing, which is typically a sign of healthy hair growth. This ratio is often used by dermatologists and trichologists to assess hair health and diagnose conditions like alopecia.

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Effects of Platelet-Rich Plasma on Hair Follicle Count and Hair Ratios in Androgenic Alopecia: Alone or Combined with Other Treatments

research Effects of platelet-rich plasma application on hair follicle count, telogen/anagen ratio, and miniaturized hair ratio in patients with androgenic alopecia: alone or in combination with other treatments

July 2025 in “Journal of Dermatological Treatment”

PRP improves hair growth in androgenic alopecia, especially when combined with minoxidil.

Promotion of Anagen, Increased Hair Density, and Reduction of Hair Fall in a Clinical Setting Following Identification of FGF5-Inhibiting Compounds via a Novel 2-Stage Process

research Promotion of anagen, increased hair density and reduction of hair fall in a clinical setting following identification of FGF5-inhibiting compounds via a novel 2-stage process

27 citations , February 2017 in “Clinical, Cosmetic and Investigational Dermatology”

New compounds were found to help increase hair growth and decrease hair loss.

research A stain for plucked anagen hairs

17 citations , August 1979 in “Journal of The American Academy of Dermatology”

A new staining method helps tell growing from resting hairs to diagnose hair loss.

research Fluridil, a Rationally Designed Topical Agent for Androgenetic Alopecia: First Clinical Experience

17 citations , August 2002 in “Dermatologic Surgery”

Fluridil safely promotes hair growth in men with androgenetic alopecia.

research Fluridil, a Rationally Designed Topical Agent for Androgenetic Alopecia

August 2002 in “Dermatologic Surgery”

Fluridil safely promotes hair growth in men with androgenetic alopecia.

research Finasteride increases anagen hair in men with androgenetic alopecia

129 citations , October 2000 in “British Journal of Dermatology”

Finasteride helps increase hair growth in men with hair loss.

LB1010 Ashwagandha-Derived Exosome-Like Nanoparticles Significantly Promote Human Hair Growth Ex Vivo and In Vivo by Stimulating the Production of the Anagen Promoting Growth Factor VEGF-A

research LB1010 Ashwagandha-derived exosome-like nanoparticles significantly promote human hair growth ex vivo and in vivo by stimulating the production of the anagen promoting growth factor VEGF-A

July 2024 in “Journal of Investigative Dermatology”

Ashwagandha nanoparticles help hair grow by increasing a growth factor.

research Amaranthus Extract Promotes Healthy Follicles and Anagen Hair Density-A Randomized Placebo-Controlled, Double-Blinded Study.

October 2025 in “PubMed”

Amaranthus extract cream safely boosts hair growth in men with hair loss.

research Effect of mycophenolic acid on proliferation of dermal papilla cells and induction of anagen hair follicles

16 citations , March 2015 in “Clinical and experimental dermatology”

Mycophenolic acid may help treat hair loss by promoting hair growth and cell proliferation.

research A Novel, Drinkable Food Supplement Formulation Reduces Hair Shedding and Increases the Percentage of Anagen Scalp Hair Follicles in Females with Hair Loss

November 2025 in “Journal of Clinical Medicine”

The drinkable supplement reduced hair shedding and increased hair growth in women.

research Objective evaluation of photoepilation by phototrichogram

1 citations , August 2010 in “Journal of dermatology”

Photoepilation significantly reduces hair, and phototrichograms can objectively measure its effectiveness.

research Trichology to predict efficacy of scalp cooling: New pathologic insights besides encouraging clinical results.

June 2024 in “Journal of clinical oncology”

Scalp cooling can effectively prevent hair loss during chemotherapy, improving patients' quality of life.

research The Effectiveness of Medicated Hair Tonic Containing Royal Jelly Extract

March 2024 in “Journal of Society of Cosmetic Chemists of Japan”

The hair tonic with royal jelly extract improved hair growth and scalp health.

research Phototrichogram 을 이용한 한국인 두피 모발 특성의 정량적 분석

September 2002 in “대한피부과학회지”

Koreans have lower hair density, larger hair diameter, and slower hair growth than Caucasians.

research An analysis of canine hair re‐growth after clipping for a surgical procedure

20 citations , February 2004 in “Veterinary dermatology”

Dog hair grows back in about 14 weeks after being clipped for surgery, and the season doesn't really affect this growth rate.

research Postpartum telogen effluvium

7 citations , January 2015 in “Journal of the European Academy of Dermatology and Venereology”

Only about 20% of women have hair loss after childbirth severe enough to be considered clinically significant.

research Quantification of female pattern hair loss: a study in a Turkish population.

7 citations , November 2007 in “PubMed”

Turkish women with female pattern hair loss have lower hair density, and visual counting is more effective than digital image analysis for detecting this.

research TrichoScan as a method to determine hair root pattern in patients with scalp psoriasis.

6 citations , January 2010 in “PubMed”

Scalp psoriasis is linked to impaired hair growth with more hair in the resting phase.

research Lonely Hair Sign: Not Specific for Frontal Fibrosing Alopecia

4 citations , October 2012 in “Archives of Dermatology”

Hair diameter diversity is a key sign for diagnosing and managing male pattern baldness.

Comparative Study of a Topical and Oral Combination Therapy Containing Oleanolic Acid, Apigenin, and Biotinyl Tripeptide-1 in Patients with Androgenetic Alopecia: A Prospective, Open-Label Trial

research Comparative Study of a Topical and Oral Combination Therapy Containing Oleanolic Acid, Apigenin, and Biotinyl Tripeptide-1 in Patients with Androgenetic Alopecia: A Prospective, Open-Label Trial

July 2025 in “Cosmetics”

The combination therapy improved hair growth and thickness in people with androgenetic alopecia.

Evaluation of Hair Growth Promoting Activity of Sansevieria Trifasciata P. on Androgenic Alopecia in Male Rabbits

research Evaluation of Hair Growth Promoting Activity of Sansevieria Trifasciata P. on Alopecia Androgenic Rabbit Male

January 2021 in “International journal of pharmaceutical research”

Sansevieria trifasciata P. extracts, especially the ethyl acetate fraction, effectively promote hair growth in male rabbits with hair loss.

Evaluation of the Effect of a Formulation Containing Millet Extract, Wheat Germ Oil, L-Cystine, and Calcium Pantothenate Using Digital Phototrichogram in Women with Diffuse Alopecia

research Diffüz Alopesili Kadınlarda "Dijital Fototrikogram" ile "Darı Ekstresi, Buğday Tohumu Yağı, L-sistin, Kalsiyum Pantotenat" Formulasyonunun Etkisinin Değerlendirilmesi

June 2012 in “Turkderm”

Millet extract, wheat germ oil, L-cystine, and calcium pantothenate reduced hair loss and improved hair growth in women with diffuse alopecia.

research Histopathologic Evaluation of Alopecias

90 citations , June 2006 in “The American Journal of Dermatopathology”

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

research A comparison of vertical versus transverse sections in the evaluation of alopecia biopsy specimens

56 citations , July 2005 in “Journal of The American Academy of Dermatology”

Using both vertical and transverse sections gives a better diagnosis of alopecia than using one method alone.

Hair Diameter Diversity: A Clinical Sign Reflecting Follicle Miniaturization

research Hair diameter diversity: a clinical sign reflecting the follicle miniaturization.

41 citations , May 2001 in “PubMed”

Different thicknesses of hair strands can indicate the severity of hair thinning.

research TrichoScan: combining epiluminescence microscopy with digital image analysis for the measurement of hair growth in vivo.

31 citations , August 2001 in “PubMed”

TrichoScan accurately measures hair growth and showed improved hair counts and thickness after finasteride treatment.

research TrichoScan

28 citations , December 2002 in “Der Hautarzt”

TrichoScan accurately measures hair growth and loss, showing increased hair counts and thickness with treatment.

research Hair growth promoting effect of white wax and policosanol from white wax on the mouse model of testosterone-induced hair loss

27 citations , February 2017 in “Biomedicine & Pharmacotherapy”

White wax and policosanol from white wax effectively reduced hair loss and promoted hair growth in mice better than a known hair growth drug.

Platelet-Rich Plasma in Combination With 5% Minoxidil Topical Solution and 1 mg Oral Finasteride for the Treatment of Androgenetic Alopecia: A Randomized Placebo-Controlled, Double-Blind, Half-Head Study

research Platelet-Rich Plasma in Combination With 5% Minoxidil Topical Solution and 1 mg Oral Finasteride for the Treatment of Androgenetic Alopecia: A Randomized Placebo-Controlled, Double-Blind, Half-Head Study

19 citations , May 2017 in “Dermatologic Surgery”

Combining platelet-rich plasma with 5% minoxidil solution improves hair regrowth in androgenetic alopecia patients.

research The histopathology of alopecia areata in vertical and horizontal sections

19 citations , December 2001 in “Dermatologic Therapy”

Horizontal scalp biopsy sections are better for diagnosing alopecia areata, showing fewer hair follicles and more miniaturized hairs.