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Glossary Hair Growth Cycle

process where hair follicles undergo growth, transition, and rest phases

The Hair Growth Cycle, also known as Hair Follicle Cycling, consists of three main phases: anagen (growth phase), catagen (transitional phase), and telogen (resting phase). During the anagen phase, hair actively grows from the follicle, which can last several years. The catagen phase is a short period where growth stops, and the hair follicle shrinks. Finally, in the telogen phase, the hair rests before eventually falling out, making way for new hair to begin the cycle again. Understanding these phases is crucial for diagnosing and treating hair loss conditions like alopecia.

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Research

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research Effect of Helium-Neon Laser Irradiation on Hair Follicle Growth Cycle of Swiss Albino Mice

36 citations , December 2009 in “Skin pharmacology and physiology”

In this study, helium-neon laser irradiation at approximately 1 J/cm² significantly increased the percentage of hair follicles in the anagen phase in both testosterone-treated and untreated mice, suggesting stimulation of hair growth.

research Expression of Vimentin in hair follicle growth cycle of inner Mongolian Cashmere goats

23 citations , January 2018 in “BMC genomics”

This study found that vimentin expression in the hair follicles of Inner Mongolian Cashmere goats is highest during the growth stage and localized to the outer root sheath, suggesting a role in hair cycle regulation.

research Screening the key genes of hair follicle growth cycle in Inner Mongolian Cashmere goat based on RNA sequencing

14 citations , May 2020 in “Archiv für Tierzucht”

This study found that genes such as FGF5, FGFR1, and RRAS may impact the growth cycle of secondary hair follicles in Inner Mongolian Cashmere goats.

research 1428 DKK2 and SOSTDC1 cooperate to initiate the first catagen phase of the hair follicle growth cycle

April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology”

The study demonstrated that both DKK2 and SOSTDC1 are necessary for normal timing of the first catagen phase in mice hair growth cycles.

Additional File 4 of Time-Course RNA-Seq Analysis Reveals Stage-Specific and Melatonin-Triggered Gene Expression Patterns During the Hair Follicle Growth Cycle in Capra Hircus

research Additional file 4 of Time-course RNA-seq analysis reveals stage-specific and melatonin-triggered gene expression patterns during the hair follicle growth cycle in Capra hircus

January 2022 in “Figshare”

Melatonin affects when and how certain genes work during the growth of goat hair follicles.

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Community Join

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community Scalp Skin Barrier Health and Hair Follicle Cycling: A Potential Overlooked Connection

in Technology 4 months ago

The conversation discusses the importance of scalp skin barrier health in hair follicle cycling, suggesting treatments like ceramides or niacinamide to support hair growth. It also mentions the use of finasteride for hair loss.

community PP405 Won't Work Long Term: Hair Follicle Damage Due to Abuse of the ISR System

67 upvotes 11 months ago

PP405 may damage hair follicles if used long-term, suggesting cycling might be necessary. Combining it with finasteride could help maintain hair growth.

community if hair follicle miniaturization happens slowly and gradually over a few hair cycles then wouldn't that mean that to regain maximum or top thickness from treatment you would at least need 5-10 years?

in Research/Science 53 upvotes 10 months ago

Hair regrowth from treatments like finasteride, dutasteride, and minoxidil can take several years, with most visible results appearing within 1-2 years and potential improvements continuing up to 10 years. Consistency and patience are crucial for achieving maximum hair thickness, as hair miniaturization and regrowth are gradual processes.

community Scalp hydration's surprising link to hair growth cycle regulation

in Technology 23 upvotes 4 months ago

Scalp hydration may influence hair growth by affecting the signaling pathways that control the hair growth cycle. Users suggest using facial moisturizer, aloe vera, and oils for scalp hydration.

community Circadian rhythm disruption and its potential impact on hair growth cycles

in Technology 7 upvotes 4 months ago

Poor sleep quality may affect hair growth cycles by disrupting the body's natural clock and stress hormones. The focus should be on improving sleep to support overall health, including hair growth, rather than relying solely on treatments like Minoxidil, finasteride, or RU58841.

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Learn

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learn Hair Transplant

What happens after a hair transplant? Expect mild swelling and redness, with new hair growth starting in 3 to 6 months.

learn Latanoprost

glaucoma medication with hair follicle stimulant effects

learn Stemoxydine

chemical from L'Oreal that encourages hair to enter growth phase

learn Follistatin

glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

learn Vascular Endothelial Growth Factor

learn Bimatoprost

a synthetic prostamide used to treat eyelashes also shows promise for stimulating hair growth on scalp

learn oleic acid

How does Oleic Acid support hair follicle strength and growth? Oleic acid strengthens hair follicles by enhancing hydration and reducing inflammation.

learn Procyanidin

What is Procyanidin, and how does it encourage hair growth at the follicle level? Procyanidin stimulates hair growth by promoting cell proliferation in hair follicles.

learn Salicylic acid

How does salicylic acid help clean and unclog hair follicles for better hair growth? Salicylic acid unclogs hair follicles by exfoliating dead skin and excess sebum.

learn Folic acid

How does folic acid support hair follicle health and growth at a cellular level? Folate is required for the DNA synthesis that fast-dividing hair matrix cells depend on, and severe deficiency causes anemia—but no published trial has given folic acid to people with hair loss and measured the result, so a growth effect is a mechanism, not a finding.

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Clinics

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

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Hairo Fallas