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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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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 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 Approach to the Adult Female Patient with Diffuse Nonscarring Alopecia

67 citations, November 2002 in “Journal of The American Academy of Dermatology”

The document concludes that careful evaluation is key to diagnose and treat women with hair loss, with tests for thyroid, iron, and hormones as needed.

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 To Study the Effect of Activated Platelet-Rich Plasma in Cases of Androgenetic Alopecia

March 2021 in “Türk plastik cerrahi dergisi”

Activated platelet-rich plasma is a safe and effective treatment for hair loss.

research Short Anagen Syndrome in an African American Woman

10 citations, May 2010 in “Journal of The American Academy of Dermatology”

A 38-year-old African American woman has a rare condition that prevents her from growing long hair.

research Short Anagen Syndrome: A Case Series and Algorithm for Diagnosis

4 citations, August 2021 in “Pediatric dermatology”

Biotin, alone or with minoxidil, effectively treats short anagen syndrome.

research Short Anagen Syndrome in an Indian Woman and Its Impact on Quality of Life

2 citations, January 2012 in “International Journal of Trichology”

An Indian woman with Short Anagen Syndrome had very short hair and a lower quality of life.

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 Hair Loss

5 citations, October 1984 in “The BMJ”

Up to 50% of scalp hair can be lost before it appears thin, and treatment is only needed for hair loss caused by diseases or deficiencies.

research Permanent Alopecia After Systemic Chemotherapy: A Clinicopathological Study of 10 Cases

57 citations, March 2011 in “The American Journal of Dermatopathology”

Chemotherapy can cause permanent, non-reversible hair loss similar to pattern baldness.

research Hair Follicle Miniaturization in a Woolly Hair Nevus

6 citations, February 2016 in “American Journal of Dermatopathology”

The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.

research Evaluation of Alopecia

1 citations, March 1995 in “JAMA”

The woman's hair loss is likely stress-related and should improve without treatment.

research Effectiveness and Safety of Hair Growth Formulation Containing Tectona Grandis L.f (Teak) Leaf Extract: A Randomized, Double-Blind, Placebo-Controlled Study on Males with Androgenic Alopecia

January 2024 in “Journal of Evidence-Based Integrative Medicine”

Teak leaf extract may effectively and safely promote hair growth in males with androgenic alopecia.

research The Effect of an Oral Product Containing Amla Fruit on Female Androgenetic Alopecia: A Randomized Controlled Trial

July 2023 in “Journal of Ethnopharmacology”

Amla fruit syrup improved hair growth and satisfaction in women with hair loss without significant side effects.

research Interest of a Cinchona Succirubra Extract and Its Association with Caffeine in Hair Loss

April 2023 in “Journal of Investigative Dermatology”

Cinchona succirubra extract with caffeine improves hair growth and reduces hair loss.

research Hair Counts from Normal Scalp Biopsy in Taiwan

24 citations, September 2012 in “Dermatologic Surgery”

The conclusion is that normal scalp hair counts for Taiwanese people were established, showing age-related differences but not sex or scalp location differences.

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 Evaluation of Hair Growth Promoting Activity of Phyllanthus Niruri

8 citations, December 2015 in “PubMed”

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

research Overactive Bladder in Men: Finasteride for Androgenetic Alopecia

1 citations, January 2009 in “CRC Press eBooks”

Finasteride increases hair count and improves hair growth with low risk of side effects.

research Potential Remedial Effects of Solanum Nigrum Berries on Alopecia: An In Vivo Study

January 2024 in “Journal of Natural Remedies”

Solanum nigrum extract may help regrow hair.

research Effect of Cuscuta Reflexa Roxb 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 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.

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.

Hair Growth Promoting Potential of Phospholipids Purified from Porcine Lung Tissues

research Efficacy of Platelet-Rich Plasma in Conjunction with Photobiomodulation by Low-Level Laser Therapy Versus Platelet-Rich Plasma in Androgenic Alopecia

February 2024

Combining PRP with low-level laser therapy is better for hair growth than PRP alone.