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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 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 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 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 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.

Characteristic Features of Japanese Women's Hair With Aging and Hair Loss

research Characteristic features of Japanese women's hair with aging and with progressing hair loss

76 citations , December 2006 in “Journal of Dermatological Science”

Japanese women typically start experiencing hair loss after 40, with reduced hair density and thickness being the main factors.

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.

Evaluation of Biophysical Skin Parameters and Hair Changes in Patients with Acne Vulgaris Treated with Isotretinoin, and the Effect of Biotin Use on These Parameters

research Evaluation of biophysical skin parameters and hair changes in patients with acne vulgaris treated with isotretinoin, and the effect of biotin use on these parameters

5 citations , March 2021 in “International Journal of Dermatology”

Biotin supplementation during isotretinoin treatment for acne may help maintain skin hydration and improve hair growth.

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.

Prospective Efficacy and Safety Study of an Innovative Kerascalp Hair Growth Serum in Mild-to-Moderate Alopecia in India: Regrowth Study

research Prospective Efficacy and Safety Study of an Innovative Kerascalp Hair Growth Serum in Mild-to-Moderate Alopecia in India: Regrowth Study

May 2023 in “Cureus”

Kerascalp hair serum was found to be safe and effective in improving hair growth and strength in people with mild to moderate hair loss.

research ISID1417 - Interest of a cinchona succirubra extract and its association with caffeine in hair loss

May 2023

Cinchona succirubra extract with caffeine reduces hair loss and strengthens hair.

research Interest of an anti–hair loss shampoo supplement used alone and in association with the reference treatment in the management of hair loss

August 2019 in “Journal of the American Academy of Dermatology”

The shampoo helps reduce hair loss and improves Minoxidil® absorption.

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.

research Growth and viability of Liaoning Cashmere goat hair follicles during the annual hair follicle cycle

10 citations , January 2014 in “Genetics and Molecular Research”

Liaoning Cashmere goat hair follicles show synchronized growth patterns with lowest activity in May.

research A Review: Herbal Hair Growth Tonic

April 2025 in “International Journal for Research in Applied Science and Engineering Technology”

The herbal hair growth tonic is a safe and effective natural alternative to chemical products.

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.

Identification of Factors Contributing to Phenotypic Divergence via Quantitative Image Analyses of Autosomal Recessive Woolly Hair/Hypotrichosis with Homozygous c.736T>A LIPH Mutation

research Identification of factors contributing to phenotypic divergence via quantitative image analyses of autosomal recessive woolly hair/hypotrichosis with homozygous c.736T>ALIPHmutation

12 citations , July 2016 in “British journal of dermatology/British journal of dermatology, Supplement”

Different hair fiber development might explain why hair loss severity varies in patients with a specific genetic mutation, and treatments that thicken hair could help.

research Is TrichoScan a new diagnostic method for diffuse hair loss?

2 citations , January 2014 in “Turkish Journal of Medical Sciences”

TrichoScan effectively diagnoses different types of hair loss and is linked to low iron stores in patients.

research TrichoScan: A Novel Tool For The Analysis of Hair Growth In Vivo

70 citations , June 2003 in “Journal of Investigative Dermatology Symposium Proceedings”

TrichoScan is a reliable method for measuring hair growth and is useful for assessing hair loss treatments.

research The Hair Growth-Promoting Effect ofRumex japonicusHoutt. Extract

8 citations , January 2016 in “Evidence-based Complementary and Alternative Medicine”

Rumex japonicus extract may promote hair growth more effectively than Minoxidil.

research The hair root pattern after calcipotriol treatment for scalp psoriasis.

8 citations , September 1995 in “Acta Dermato Venereologica”

Calcipotriol treatment for scalp psoriasis does not cause hair loss.

research Evaluation of hair growth promoting activity of Phyllanthus niruri.

8 citations , January 2015 in “PubMed”

Phyllanthus niruri extract may help treat hair loss by promoting hair growth and blocking a hair loss-related enzyme.

A Comparative In Vivo and In Vitro Evaluation of Hair Growth Potential of Extracts and an Isolate from Petroleum Ether Extract of Cuscuta Reflexa Roxb

research A comparative in vivo and in vitro evaluation of hair growth potential of extracts and an isolate from petroleum ether extract of Cuscuta reflexa Roxb

7 citations , September 2014 in “Beni-Suef University Journal of Basic and Applied Sciences”

Cuscuta reflexa extracts and an isolate promoted hair growth and could be natural treatments for hair loss.

A Proprietary Herbal Extract Against Hair Loss in Androgenetic Alopecia and Telogen Effluvium: A Placebo-Controlled, Single-Blind, Clinical-Instrumental Study

research A proprietary herbal extract against hair loss in androgenetic alopecia and telogen effluvium: a placebo-controlled, single-blind, clinical-instrumental study

1 citations , January 2018 in “Acta dermatovenerologica Alpina, Pannonica et Adriatica (Tiskana izd.)”

The herbal extract was found to effectively reduce and prevent hair loss without any side effects.