Fibroblasts are the workhorse cells of the skin’s connective tissue. Found mainly in the dermis, they build and maintain the scaffold that keeps skin firm, plump and resilient—producing collagen, elastin and the other components of the extracellular matrix. They are also the cells that drive wound healing. Because so many aesthetic treatments work by prompting fibroblasts to make fresh collagen, understanding these cells is key to understanding how skin ages and how it can be improved.
At a glance
- What they are: The main cells of the dermis and of connective tissue throughout the body
- What they make: Collagen, elastin, hyaluronic acid and the rest of the extracellular matrix
- Key role: Building, maintaining and repairing the skin’s structural scaffold
- In wound healing: They migrate to the wound and can become myofibroblasts that help pull it closed
- With age: Fibroblasts become fewer and less active, so less collagen is made—skin thins and loses firmness
- Why it matters: Many skin treatments work by stimulating fibroblasts to produce new collagen
What are fibroblasts?
Fibroblasts are mesenchymal cells distributed widely throughout the body, and they are the predominant cell type of connective tissue and of the skin’s dermis.[1][2] Their name is a clue to their job: “fibro” for fibres and “blast” for a cell that builds. In the skin, fibroblasts are the principal cells responsible for synthesising the dermal components that give skin its structure.[2] They are not passive—fibroblasts constantly produce and remodel the material around them, keeping the skin’s framework in a state of ongoing renewal.
What fibroblasts do: building the skin’s scaffold
The central job of fibroblasts is to create and maintain the extracellular matrix—the network of fibres and gel that surrounds skin cells and gives the dermis its substance. Fibroblasts synthesise collagen (chiefly types I and III in skin) for strength, elastin for stretch and recoil, and glycosaminoglycans including hyaluronic acid for hydration and volume.[1] In fact, the skin holds a large share of the body’s total hyaluronic acid.[1] Together these components form the scaffold that makes skin firm, supple and cushioned—and fibroblasts are the cells that keep it built.
Fibroblasts and wound healing
Fibroblasts are central to how skin repairs itself. When skin is injured, fibroblasts migrate into the wound and ramp up production of new matrix to rebuild the damaged tissue, continuously secreting and remodelling collagen as the wound matures.[1] Some fibroblasts differentiate into myofibroblasts—specialised cells rich in contractile proteins that physically help draw the wound edges together.[1] This repair machinery is the same system that aesthetic treatments tap into: many procedures create controlled micro-injury precisely to trigger the fibroblasts’ natural rebuilding response.
Fibroblasts and skin ageing
As skin ages, fibroblasts gradually become fewer in number and less active, so they produce less collagen and matrix than they once did.[1] The existing scaffold also breaks down faster, and the balance tips toward loss—which is why mature skin tends to thin and lose firmness, and why fine lines set in. Ultraviolet exposure accelerates this by damaging both the fibroblasts and the matrix they maintain. Supporting fibroblast health—above all through daily sun protection—is therefore one of the most effective long-term strategies for keeping skin resilient.
Why fibroblasts matter in aesthetics
Almost every treatment aimed at improving skin quality ultimately works through the fibroblast. Collagen-stimulating procedures create a controlled healing response that prompts fibroblasts to lay down fresh collagen—a process known as neocollagenesis—which gradually firms and thickens the skin over weeks to months. Biostimulatory dermal fillers work on the same principle, encouraging the skin to build its own collagen rather than simply adding volume. Understanding that these results depend on the skin’s own cells explains why they build gradually and why healthy, protected fibroblasts respond best. At Revel, this cell-first thinking guides our skin rituals. This entry is educational and does not replace individual medical advice.
Related glossary terms
Clinical & editorial sources
- Zhang J, et al. The Role of Fibroblasts in Skin Homeostasis and Repair. Biomedicines. 2024;12(7):1586. mdpi.com
- Brown TM, Krishnamurthy K. Histology, Dermis. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. NBK535346
This glossary entry provides general educational information and does not replace an individual clinical assessment or medical advice.
Clinically reviewed by: Leah Zawawi, RPN | Medical Aesthetics & Injectables.
Last reviewed: August 2026.