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Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss
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Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss
Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss
Nicole Natarelli 1, Nimrit Gahoonia 2, Raja K Sivamani 3 4 5 6
The hair cycle is composed of four primary phases: anagen, catagen, telogen, and exogen. Anagen is a highly mitotic phase characterized by the production of a hair shaft from the hair follicle, whereas catagen and telogen describe regression and the resting phase of the follicle, respectively, ultimately resulting in hair shedding. While 9% of hair follicles reside in telogen at any time, a variety of factors promote anagen to telogen transition, including inflammation, hormones, stress, nutritional deficiency, poor sleep quality, and cellular division inhibiting medication. Conversely, increased blood flow, direct stimulation of the hair follicle, and growth factors promote telogen to anagen transition and subsequent hair growth. This review seeks to comprehensively describe the hair cycle, anagen and telogen balance, factors that promote anagen to telogen transition and vice versa, and the clinical utility of a variety of lab testing and evaluations. Ultimately, a variety of factors impact the hair cycle, necessitating a holistic approach to hair loss.
Keywords: alopecia; anagen; androgenic; hair cycle; hair loss; hair thinning; telogen.
Probably one of the few times (in the full length link) where poor sleep is acknowledged as a factor. That said, "they" are still in the dark on the dental connection.
Full: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917549/
Nicole Natarelli 1, Nimrit Gahoonia 2, Raja K Sivamani 3 4 5 6
The hair cycle is composed of four primary phases: anagen, catagen, telogen, and exogen. Anagen is a highly mitotic phase characterized by the production of a hair shaft from the hair follicle, whereas catagen and telogen describe regression and the resting phase of the follicle, respectively, ultimately resulting in hair shedding. While 9% of hair follicles reside in telogen at any time, a variety of factors promote anagen to telogen transition, including inflammation, hormones, stress, nutritional deficiency, poor sleep quality, and cellular division inhibiting medication. Conversely, increased blood flow, direct stimulation of the hair follicle, and growth factors promote telogen to anagen transition and subsequent hair growth. This review seeks to comprehensively describe the hair cycle, anagen and telogen balance, factors that promote anagen to telogen transition and vice versa, and the clinical utility of a variety of lab testing and evaluations. Ultimately, a variety of factors impact the hair cycle, necessitating a holistic approach to hair loss.
Keywords: alopecia; anagen; androgenic; hair cycle; hair loss; hair thinning; telogen.
Probably one of the few times (in the full length link) where poor sleep is acknowledged as a factor. That said, "they" are still in the dark on the dental connection.
Full: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9917549/
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thissucks likes this post
Re: Integrative and Mechanistic Approach to the Hair Growth Cycle and Hair Loss
Very intresting!
Thanks for that.
Thanks for that.
Jean-Guy- Posts : 50
Join date : 2023-03-16
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