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GlossaryCollagen Density

concentration of collagen fibers in tissue

Collagen density refers to the concentration and arrangement of collagen fibers within a given tissue, such as skin or hair follicles. Higher collagen density typically indicates stronger, more resilient tissue, which can impact skin elasticity and hair strength. For professionals, assessing collagen density can be crucial for understanding tissue health and developing treatments for conditions like alopecia or skin aging.

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research Calcium and Vitamin D Supplementation with and Without Collagen on Bone Density and Skin Elasticity in Menopausal Women—A Randomized Controlled Study

September 2025 in “Clinics and Practice”

Collagen with calcium and vitamin D improves bone health, skin elasticity, and reduces hair loss in menopausal women.

research A Single Injection of the Anabolic Bone Agent, Parathyroid Hormone–Collagen Binding Domain (PTH–CBD), Results in Sustained Increases in Bone Mineral Density for up to 12 Months in Normal Female Mice

23 citations , July 2012 in “Calcified Tissue International”

A single injection of PTH–CBD can increase bone density for up to a year.

research Effect of Patient Age on Platelet-Rich Plasma (PRP) and Fibrin Treatments for Skin Density and Thickness: A Single-Center Ultrasound Study

3 citations , February 2025 in “Life”

PRP and fibrin treatments improve skin thickness and density, regardless of age.

Correction of Wrinkles, Peau d’Orange, and Thin Dermis of the Face by Neocollagenesis Using Novel Collagen Stimulating Slurry Protocol

research Correction of Rhytides, Peau d’Orange, and Thin Dermis of the Face by Neocollagenesis Using Novel Collagen Stimulating Slurry Protocol

3 citations , June 2017 in “Aesthetic plastic surgery”

The new facial treatment improved wrinkles and skin thickness, with most patients seeing results within a month, despite some temporary swelling and bruising.

Low-Molecular-Weight Collagen Peptides Improve Hair Health in Adults with Damaged Hair: A Randomized, Double-Blind, Placebo-Controlled Trial

research Low-Molecular-Weight Collagen Peptides Improve Hair Health in Adults with Damaged Hair: A Randomized, Double-Blind, Placebo-Controlled Trial

January 2026 in “International Journal of Peptide Research and Therapeutics”

Collagen supplements improve hair health and are safe.

research Engineered Collagen XVII-loaded dissolving microneedle patch for promoting hair regrowth in androgenic alopecia

January 2025 in “Regenerative Biomaterials”

A dissolving microneedle patch with collagen XVII effectively promotes hair regrowth in androgenic alopecia.

research An Androgenetic Alopecia Remedy Based on Marine Collagen Peptide-Incorporated Dissolving Microneedles

November 2023 in “International Journal of Pharmaceutics”

New hair loss treatment using marine collagen and dissolvable needles improves hair growth.

Parathyroid Hormone Linked to a Collagen Binding Domain Promotes Hair Growth in a Mouse Model of Chemotherapy-Induced Alopecia in a Dose-Dependent Manner

research Parathyroid hormone linked to a collagen binding domain promotes hair growth in a mouse model of chemotherapy-induced alopecia in a dose-dependent manner

8 citations , April 2014 in “Anti-Cancer Drugs”

A hormone linked to collagen helps hair grow back in mice after chemotherapy, and may also prevent bone loss.

Recombinant Humanized Collagen Combined With Nicotinamide Increases Expression of Rat Basement Membrane Proteins and Promotes Hair Growth

research Recombinant humanized collagen combined with nicotinamide increases the expression level of rat basement membrane proteins and promotes hair growth

June 2025 in “Frontiers in Bioengineering and Biotechnology”

Recombinant collagen with nicotinamide boosts hair growth and health.

research Revitalizing skin, hair, nails, and muscles: Unlocking beauty and wellness with vegan collagen

July 2024 in “Journal of Cosmetic Dermatology”

Vegan collagen builder improves hair growth, skin smoothness, and reduces wrinkles and pain.

research Use of Plasma Gel as Autologous Collagen Biostimulator with Simplified Technique: Case Report

December 2023

Plasma gel and PRP treatments improve skin and hair with minimal side effects.

research Bioactive Nutritional Macromolecules Supporting Hair Structure, Density, and Growth: A Comprehensive Review

March 2026 in “Cosmetics”

Type I collagen, elastin, keratin, ceramides, and melanin improve hair strength, growth, and health.

research Use of platelet rich plasma for skin rejuvenation

28 citations , April 2024 in “Skin Research and Technology”

Platelet-rich plasma (PRP) is effective and safe for improving skin appearance.

research The effects of narrowbands of visible light upon some skin disorders: a review

17 citations , December 2015 in “International Journal of Cosmetic Science”

Visible light can improve skin disorders and hair loss, but more research is needed to understand long-term effects.

research Label-free concurrent 5-modal microscopy (Co5M) resolves unknown spatio-temporal processes in wound healing

13 citations , September 2021 in “Communications Biology”

Co5M offers a new way to observe and understand wound healing without labels.

research Skin care during the menopause period: noninvasive procedures of beauty studies

11 citations , January 2013 in “Postępy Dermatologii i Alergologii”

The conclusion is that a combination of noninvasive treatments and lifestyle changes can improve skin health during menopause.

Gold Thread Implantation Promotes Hair Growth in Humans and Mice

research Gold thread implantation promotes hair growth in human and mice

5 citations , January 2017 in “Laboratory Animal Research”

Gold thread implantation may help hair grow in humans and mice.

research Immune Cells in Cutaneous Wound Healing: A Review of Functional Data from Animal Models

5 citations , February 2022 in “International Journal of Molecular Sciences”

Different immune cells like platelets, mast cells, neutrophils, macrophages, T cells, B cells, and innate lymphoid cells all play roles in skin wound healing, but more research is needed due to inconsistent results and the complex nature of the immune response.

research Release systems based on self-assembling RADA16-I hydrogels with a signal sequence which improves wound healing processes

1 citations , April 2023 in “Scientific Reports”

Self-assembling RADA16-I hydrogels with bioactive peptides significantly improve wound healing.

research Exploring Physiological Differences in Injury Response by Skin Tone: A Scoping Review

February 2025 in “Journal of Tissue Viability”

Dark skin is more prone to severe pressure ulcers due to reduced ceramide content and detection challenges.

research Platelet-Rich Plasma in Aesthetic Dermatology: Current Evidence and Future Directions

August 2024 in “Cureus”

PRP is promising for skin, hair, and wound treatments but needs standardized methods and more research.

research Biocompatibility of KAPs-Depleted Residual Hair

May 2024 in “bioRxiv (Cold Spring Harbor Laboratory)”

KAP-depleted hair causes less immune response and is more biocompatible for implants.

Dynamic Changes in Fibroblast Subpopulations Drive Development of Radiation-Induced Skin Fibrosis Through the Fra/c-Jun Pathway

research 1493 Dynamic changes in fibroblast subpopulations drives development of radiation-induced skin fibrosis through the fra/c-jun pathway

April 2023 in “Journal of Investigative Dermatology”

Radiation treatment causes skin fibrosis by increasing certain fibroblast subpopulations, but using a c-Jun inhibitor or fat grafting can reduce this effect.