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GlossaryAnagen/Telogen Ratio

measure of hair follicles in growth vs. resting phases

The Anagen/Telogen Ratio is a measure used to assess hair growth and health by comparing the number of hair follicles in the anagen (growth) phase to those in the telogen (resting) phase. A higher ratio indicates a greater proportion of actively growing hair, which is typically a sign of healthy hair growth, while a lower ratio may suggest hair loss or a disruption in the hair growth cycle.

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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.

Telogen Effluvium: Causes, Diagnosis, and Treatment

research Telogen effluvium

144 citations , July 2002 in “Clinical and Experimental Dermatology”

Telogen effluvium is a common type of hair loss that can resolve on its own or become chronic, with treatment depending on early diagnosis.

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.

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.

Recovery Effects of Oral Supplementation with Polar Lipid-Rich Wheat Extracts on Acute Telogen Effluvium: A Randomized Double-Blind Placebo-Controlled Study

research Recovery Effects of Oral Supplementation with Polar Lipid-Rich Wheat Extracts on Acute Telogen Effluvium: A Randomized Double-Blind Placebo-Controlled Study

May 2025 in “Clinical Cosmetic and Investigational Dermatology”

Wheat extract supplements reduce hair shedding and improve growth in women with hair loss.

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 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 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 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.

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.

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 Effects of the RV3466F lotion on female telogen effluvium: Results from a 16 week, multi-centric, controlled, randomized trial

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

RV3466F lotion significantly reduces hair loss and improves acute telogen effluvium.

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.

Efficacy and Safety of a Drinkable Nutraceutical in Premenopausal Women with Telogen Effluvium: A 6-Month, Randomized, Multicenter, Double-Blind, Placebo-Controlled Study

research Efficacy and Safety of a Drinkable Nutraceutical in Premenopausal Women with Telogen Effluvium: A 6-Month, Randomized, Multicenter, Double-Blind, Placebo-Controlled Study

November 2025 in “Dermatology and Therapy”

The drinkable supplement increased hair growth and was safe for women with hair loss.

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 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 Effect ofCuscuta reflexaRoxb on androgen-induced alopecia

63 citations , August 2008 in “Journal of Cosmetic Dermatology”

Cuscuta reflexa extract may help treat hair loss caused by hormones.

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.

research Transverse Sections for Diagnosis of Alopecia?

24 citations , August 2005 in “The American Journal of Dermatopathology”

Vertical sections are better than horizontal sections for diagnosing alopecia.

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.