62 citations
,
July 1993 in “Journal of Investigative Dermatology” Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.
19 citations
,
March 2017 in “PLoS ONE” PSU are better than THF at regenerating skin layers in lab models.
8 citations
,
September 2011 in “Scanning” Multiphoton microscopy effectively images mouse skin layers and structures.
November 2022 in “Journal of Investigative Dermatology” DermaCult™ Keratinocyte Expansion Medium allows human skin cells to grow longer while keeping their ability to develop properly.
January 2013 in “IRIS UNIMORE (University of Modena and Reggio Emilia)” Hydrophobized silica nanoparticles penetrate the skin's outer layer more effectively, while hair follicle density doesn't impact their accumulation.
149 citations
,
March 1981 in “American Journal of Ophthalmology” Eyelid mites may contribute to eye problems.
4 citations
,
December 2016 in “Medical lasers” Lasers can be effective for treating hair loss from alopecia areata.
14 citations
,
April 2019 in “Genes” Researchers found a genetic region that influences the number of coat layers in dogs.
36 citations
,
February 2018 in “British Journal of Dermatology” Sweat glands and hair follicles are structurally connected within a specific layer of skin fat.
30 citations
,
January 1994 in “Micron” Mature hair surfaces are formed by keratinized cells with developed layers, not just modified plasma membranes.
11 citations
,
May 2013 in “Journal of Investigative Dermatology” KRTAP10 proteins help form the hair shaft's tough outer layer by interacting with specific hair keratins.
11 citations
,
January 2013 in “Veterinary dermatology” Keratinocytes from dog hair follicles can create a functional skin layer in a lab model, useful for dog skin therapy.
10 citations
,
November 2016 in “International Journal of Cosmetic Science” A tough membrane between the outer and inner layers of human hair protects it from damage.
September 2022 in “bioRxiv (Cold Spring Harbor Laboratory)” A new staining method shows a special area in the hair's skin layer with lots of proteoglycans.
81 citations
,
September 2009 in “Birth defects research” Different body areas in mice produce different hair types due to interactions between skin layers.
4 citations
,
February 2017 in “Archives of Aesthetic Plastic Surgery” Double-layer scalp wound closure is better than single-layer closure after strip hair transplant surgery.
April 2024 in “Lasers in medical science” Lasers and light therapies are effective in promoting hair regrowth for different types of hair loss.
32 citations
,
November 2004 in “Journal of pharmaceutical sciences” Different tea tree oil mixtures absorb into hair follicles at varying levels, with microemulsion being the most effective.
May 2026 in “Skin Appendage Disorders” Lasers and energy-based devices effectively and safely treat hair loss, especially when combined with other treatments.
September 2024 in “Journal of the American Academy of Dermatology” Fractional and excimer lasers effectively treat various types of alopecia and promote hair growth.
Lasers and light therapy are effective for treating skin conditions like hair loss, vitiligo, psoriasis, and molluscum contagiosum.
1 citations
,
July 2025 in “JCI Insight” Hair follicle stem cells help maintain skin health by moving to and supporting the skin's surface layers.
January 2017 in “Durham e-Theses (Durham University)” Chemical stressors damage hair structure but the skin's outer layer protects living cells.
June 2025 in “Medical alphabet” Fractional lasers, combined with topical therapy, are a promising and safe treatment for hair loss.
December 2021 in “Journal of natural fibers” The conclusion is that new methods for isolating hair cuticle cells and removing the cuticle layer are effective and convenient.
December 2017 in “PubMed” Low-level laser therapy may help treat hair loss with fewer side effects.
18 citations
,
August 2014 in “Lipids” Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.
4 citations
,
March 2021 in “Journal of Surfactants and Detergents” Shampoo B, which uses water-soluble silicone, is better at detangling hair in wet conditions due to its two-layer conditioning film.
July 1998 in “Dermatologic Surgery” Various techniques and tools for hair restoration were presented in 1998, including a mathematical model for donor area, use of lasers in surgery, methods for controlling grafted hair direction, and ways to increase graft yield. Satisfaction rates were around 39%, and studies showed trauma and dehydration can damage hair follicles.
22 citations
,
January 1985 Water makes hair more flexible, especially the outer layer.