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GlossaryHair Growth Rate

rate at which hair length increases over time

Hair Growth Rate refers to the speed at which hair grows, typically measured in millimeters or inches per month. On average, human hair grows about 0.5 inches (1.25 cm) per month, though this can vary based on factors like genetics, age, health, and nutrition. Understanding this rate is crucial for professionals dealing with hair loss treatments, hair care products, and clinical studies related to hair growth and alopecia.

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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”

Balding scalps slow down hair growth.

research Hair Cortisol Concentrations Are Associated with Hair Growth Rate

21 citations , January 2016 in “NeuroImmunoModulation”

Hair cortisol levels can indicate stress over the past three months.

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”

Women's hair grows faster and thicker than men's, but hair growth slows for both genders with pattern hair loss.

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.

Why Care About Linear Hair Growth Rates? A Study Using In Vivo Imaging and Computer-Assisted Image Analysis After Manual Processing in Unaffected Male Controls and Men with Male Pattern Hair Loss

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”

Thicker hair grows faster; hair loss patients have slower growth.

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Community Join

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community Melatonin and hair growth: legit or scam?

in Research/Science 8 upvotes 3 years ago

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

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

in Research/Science 183 upvotes 10 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 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.

in Research/Science 171 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 Some Questions Regarding FUE Hair Loss Surgery

in Transplants 5 upvotes 9 years ago

The conversation discusses FUE hair transplant surgery, including questions about donor area recovery, success rates, precautions, hair growth rate, and the safety of PRP injections. It also inquires about using hairpieces post-surgery.

community Seeking Suggestions for VEGF Gene Therapy in Hair Transplants

in Basic Questions 75 upvotes 4 months ago

A user is exploring VEGF gene therapy to enhance hair transplant results, considering measuring hair shaft diameter and growth rate. Suggestions include using phototrichograms and possibly adding PRP, though its effectiveness is uncertain.

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