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Glossary Growth Rate

speed at which hair grows over a specific period

Growth Rate, also known as Growth Velocity, refers to the speed at which hair grows over a specific period of time. Typically measured in millimeters or inches per month, this rate can vary based on factors such as genetics, age, health, and hormonal influences. Understanding growth rate is crucial for both diagnosing hair disorders and planning treatments in trichology and dermatology.

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Research

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research Reduced Linear Hair Growth Rates of Vellus and of Terminal Hairs Produced by Human Balding Scalp Grafted onto Nude Mice

23 citations , December 1991 in “Annals of the New York Academy of Sciences”

This study reported that human balding scalp grafted onto nude mice showed reduced linear growth rates of both vellus and terminal hairs.

research Hair Cortisol Concentrations Are Associated with Hair Growth Rate

21 citations , January 2016 in “NeuroImmunoModulation”

This study found that daily hair washing was associated with significantly lower hair cortisol concentrations, suggesting it may influence the accuracy of using hair cortisol as a biomarker for chronic stress.

research Gender differences in scalp hair growth rates are maintained but reduced in pattern hair loss compared to controls

11 citations , November 2015 in “Skin Research and Technology”

This study found that individuals with patterned hair loss, both male and female, showed a slower linear hair growth rate compared to controls with hair of equal thickness.

research Why care about Linear Hair Growth Rates (LHGR)? A study using in vivo imaging and computer assisted image analysis after manual processing (CAIAMP) in unaffected male controls and men with male pattern hair loss (MPHL)

7 citations , September 2014 in “European Journal of Dermatology”

This study found a significant positive correlation between hair thickness and growth rate, with a notably slower growth rate observed in men with male pattern hair loss compared to healthy controls.

research Assessment of rate of hair growth using a simple trichometer

7 citations , May 1979 in “Medical & biological engineering & computing”

The trichometer accurately measures hair growth and is easy to use.

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Community Join

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community Melatonin and hair growth: legit or scam?

6 upvotes 3 years ago

Melatonin may improve hair growth rate and thickness. The user is seeking input on the legitimacy of this claim.

community Oral Biotin and Topical Minoxidil have a synergy effect in increasing hair growth, the study was only done in healthy subjects and it was only 14 days but it does prove that biotin can play a significant role as an adjunct treatment.

168 upvotes 1 year ago

Oral biotin combined with topical minoxidil may increase hair growth rate, though the study was limited to healthy subjects and did not measure hair density. Some users report personal benefits from biotin, such as faster nail growth and healthier hair, but concerns about acne and study quality were also mentioned.

community Common hair-loss drug consistently associated with higher rates of psychiatric harm

in Research/Science 183 upvotes 11 months ago

Finasteride and dutasteride can cause psychiatric side effects like depression and suicidal thoughts in some users, especially those with a history of mental health issues. While some users experience positive hair growth results, others face severe psychological effects, raising concerns about their safety and the need for careful monitoring.

community Hairline is growing back, slowly! Is there a way to increase the rate of growing?

in Treatment 6 upvotes 1 year ago

The user is experiencing gradual hairline regrowth with finasteride and is considering increasing the concentration of topical finasteride and minoxidil to speed up growth. They are also using microneedling and considering adding tretinoin to their routine.

community one month progress but with better lighting

in Progress Pictures 17 upvotes 1 year ago

The user shared progress pictures of hair growth after switching to oral minoxidil and finasteride, noting improved lighting in the photos. They experienced a faster heart rate for a few weeks and a slight decrease in libido as side effects.

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Learn

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learn Hair Transplant

What is the graft survival rate in hair transplants? Graft survival rates in hair transplants typically range from 90% to 95%.
How long does it take for transplanted hair to grow after a hair transplant? New hair growth after a transplant typically starts around 3-4 months.

learn Stem Cell Factor

learn Dexpanthenol

precursor of vitamin B5 with hair stimulating effects

learn Melatonin

hormone commonly taken for sleep aid has some topical benefits for hair

learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Thymosin Beta 4

learn Caffeine

Does caffeine stimulate hair growth or only slow hair loss? Caffeine stimulates hair follicles in laboratory cultures, and one open-label trial in 210 men found a 0.2% caffeine topical non-inferior to minoxidil 5% on an anagen-ratio endpoint; there is no placebo-controlled evidence that it regrows hair, and none at all in alopecia areata or telogen effluvium.

learn Lavender

Does lavender promote hair growth or just soothe an irritated scalp? Lavender may promote hair growth and soothe an irritated scalp.

learn Bimatoprost

Can a lash-growth serum like bimatoprost actually work for your scalp? Bimatoprost (Latisse) is approved for eyelashes, not the scalp; two Allergan phase 2 trials in men with androgenetic alopecia posted results to ClinicalTrials.gov but were never published in a peer-reviewed journal, so scalp use remains off-label and experimental.

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Clinics

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Trichology
Retern Hair GrowthSingapore · SG

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