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Related Concept Videos

The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

4.1K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Accessory Structures of the Skin: Hair Growth and Types01:20

Accessory Structures of the Skin: Hair Growth and Types

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Hair growth begins with the production of keratinocytes by the basal cells of the hair bulb. As new cells are deposited at the hair bulb, the hair shaft is pushed through the follicle toward the surface. Keratinization is completed as the cells are pushed to the skin surface to form the shaft of hair that is externally visible. The external hair is completely dead and composed entirely of keratin. Hair can be cut or shaven without damaging the hair structure because the cut is superficial. Most...
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Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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Accessory Structures of the Skin: Hair and Hair Follicles01:16

Accessory Structures of the Skin: Hair and Hair Follicles

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Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Multipotency and Niche of Bulge Stem Cell01:06

Multipotency and Niche of Bulge Stem Cell

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A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
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Related Experiment Video

Updated: Mar 11, 2026

Collecting Hair Samples for Hair Cortisol Analysis in African Americans
06:01

Collecting Hair Samples for Hair Cortisol Analysis in African Americans

Published on: June 10, 2018

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Hair and Aging.

Graham A Turner1, Ranjit K Bhogal2

  • 1Unilever Research & Development Port Sunlight, Bebington, Merseyside, UK; graham.turner@unilever.com.

Skinmed
|November 23, 2016
PubMed
Summary

As people age, hair changes significantly, leading to reduced diameter, density, and color. These natural aging effects on hair can be worsened by styling, impacting self-expression.

Area of Science:

  • Dermatology
  • Cosmetic Science
  • Trichology

Background:

  • Hair serves as a primary tool for personal self-expression and beauty.
  • Hair condition naturally declines with age, typically after 30 years.
  • Age-related hair changes can negatively impact psychological well-being.

Purpose of the Study:

  • To review age-related changes in hair fiber and array properties.
  • To discuss the impact of these changes on hair styling.
  • To explore consumer interventions for mitigating age-related hair issues.

Main Methods:

  • Literature review of scientific studies on hair aging.
  • Analysis of hair fiber and collection of fiber properties.
  • Examination of styling techniques and consumer interventions.

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A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
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A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis

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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae
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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

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Related Experiment Videos

Last Updated: Mar 11, 2026

Collecting Hair Samples for Hair Cortisol Analysis in African Americans
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Collecting Hair Samples for Hair Cortisol Analysis in African Americans

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A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
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A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis

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Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae
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Main Results:

  • Hair diameter and density decrease with age.
  • Androgenic alopecia and diminished pigmentation are common age-related hair concerns.
  • Styling practices like heat treatments and chemical processing can exacerbate hair aging.

Conclusions:

  • Aging significantly alters hair structure and appearance, affecting styling.
  • Understanding these changes is crucial for developing effective interventions.
  • Consumers seek various methods to manage and improve age-related hair concerns.