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Glossary Young's modulus

measures material stiffness by stress-to-strain ratio in elasticity

Young's modulus, also known as the elastic modulus, is a measure of the stiffness of a material. It quantifies how much a material will deform under a given amount of stress. Specifically, it is the ratio of tensile stress (force per unit area) to tensile strain (proportional deformation) in the linear elasticity region of the material. This property is crucial in fields like materials science and engineering, as it helps predict how materials will behave under different forces.

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Research

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research Assessing Dihydrotestosterone-Induced Skin Alterations in C57BL/6 Mice: Implications for Androgenetic Alopecia through High-Resolution Ultrasound Imaging

January 2026 in “Frontiers in biomedical technologies”

In this study, high-resolution ultrasound imaging revealed that DHT administration in male C57BL/6 mice leads to increased epidermal and dermal thicknesses and decreased skin elasticity, simulating structural changes associated with Androgenetic Alopecia.

research Mechanical properties characterization of human hair fibers cortex region by multiparametric Atomic Force Microscopy mapping

October 2021 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)”

This study found that applying a cosmetic active ingredient improved the Young's modulus of chemically damaged human hair fibers, suggesting enhanced mechanical properties compared to untreated fibers.

research Protein disulphide isomerase-mediated grafting of cysteine-containing peptides onto over-bleached hair

28 citations , December 2011 in “Biocatalysis and biotransformation”

This study found that a peptide treatment using Protein disulphide isomerase improved the mechanical and thermal properties of over-bleached hair by promoting deeper peptide penetration and attachment.

research Biomechanical properties of scalp flaps and their correlations to reconstructive and aesthetic surgery procedures

28 citations , May 1998 in “Skin Research and Technology”

This study characterized the stress-strain properties of the human scalp and found that its stiffness increases significantly with load, providing valuable insights for planning scalp surgery procedures.

research Waterborne polyurethanes from castor oil-based polyols for next generation of environmentally-friendly hair-styling agents

25 citations , May 2020 in “Progress in Organic Coatings”

This study found that bio-based waterborne polyurethanes derived from castor oil may offer effective hair-styling performance without skin irritation and appear to be safer for the environment compared to traditional hair sprays.

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community The medical establishment and society are completely failing young men

in Treatment 34 upvotes 5 months ago

Young men often lack awareness of hair loss treatments like finasteride and minoxidil, causing stress and anxiety. There is a need for increased awareness and early screening to address the psychological effects of hair loss.

community young people, have you fully or almost fully reversed significant thinning with meds alone?

in Chat 4 upvotes 5 months ago

A 20-year-old male experiencing significant hair loss started using finasteride and minoxidil, considering switching to dutasteride, and seeking encouragement from others who have seen improvements. Other users shared their experiences with similar treatments, noting improvements in hair coverage and stability, with some considering hair transplants as a future option.

community For any young men whom are balding

88 upvotes 6 months ago

Young men experiencing hair loss should consult a dermatologist and consider treatments like finasteride and minoxidil. Shaving is an option, but medications can help maintain and regrow hair, though results vary.

community People who stared fin very young? How's your life right now?

in Finasteride/Dutasteride 11 upvotes 9 months ago

Young individuals experiencing hair loss are discussing their experiences with treatments like minoxidil and finasteride. Some report positive results with finasteride, despite side effects, while others share tips for managing minoxidil-related dandruff.

community Young and aggressive balders are cooked. No other way to put it.

156 upvotes 10 months ago

A 24-year-old is experiencing aggressive hair loss despite using minoxidil and finasteride for years and is considering a hair transplant. Many suggest trying dutasteride, but there are concerns about side effects.

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Learn

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learn Hair Transplant

Can young people get a hair transplant? Yes, but hair transplants are generally not recommended for young people until hair loss stabilizes.
Am I too young or too old for a hair transplant? One published guideline, based on expert opinion, advises waiting until at least 23–25 and trying medical treatment first. There is no fixed upper age, but health and donor supply matter (Mysore et al. 2021).

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Experts

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Hair Transplant Surgeon
Jang Youngsoo
Paech’ŏn-ŭp, North Korea

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Jang Youngsoo