Understanding Collagen Before Rh Collagen
Collagen accounts for 75% of the dry weight of the dermis, with Type I collagen being the most abundant form found in human tissue. Its structure is composed of three left-handed alpha chains — two identical α-1 type I chains and one α-2 type I chain — organized into a naturally occurring triple helical structure.
The body's collagen synthesis process begins inside fibroblast cells, which produce precursor alpha chains that wind into a triple-stranded structure called procollagen. Once secreted outside the cell, the enzyme procollagen peptidase trims the loose ends, forming a complete collagen molecule. These molecules then assemble into fibrils and, ultimately, complete collagen fibers.
What Is Rh Collagen (rhCOL1A1)?
Rh Collagen, or Recombinant Human Collagen Type I (rhCOL1A1), is an engineered human collagen developed specifically for injectable use. Its defining feature is being the 1st and only injectable Rh Collagen, made from natural, sustainable ingredients and fully biocompatible with human tissue.
"What I find most compelling about Rh Collagen is that it doesn't simply act as a volumizer like a typical filler — it actively signals the skin to produce its own new collagen."
Mechanism of Action
1. rhCOL1A1 binds to fibroblast receptors, stimulating Type I and III collagen production
When injected into the skin, rhCOL1A1 binds to fibroblasts — the primary cells responsible for producing collagen and elastin. This binding triggers new collagen synthesis through three main pathways:
- Integrin–FAK/Src Pathway — binding between rhCOL1A1 and integrins activates signaling through FAK/Src and ERK/PI3K, stimulating protein and collagen production within fibroblasts
- TGF-β / SMAD Pathway — integrins αvβ6/αvβ8 release latent TGF-β, activating SMAD2/3 to enter the nucleus and increase expression of the COL1A1/COL1A2 genes
- Mechanotransduction & YAP/TAZ — as the skin becomes firmer, fibroblasts sense mechanical tension within the tissue, causing YAP/TAZ to move into the nucleus and sustain ongoing collagen production
2. Reduces inflammation and boosts antioxidant capacity
Rh Collagen also helps activate Nrf2, which increases antioxidant enzyme production, while reducing NF-κB activity, a key driver of inflammation — strengthening the skin from within.
Clinical Study Results
A study published in Biomedicines (2024), involving 100 participants aged 27–70, found:
- An average wrinkle reduction of 40–45%
- Firmer, more hydrated skin within 30–60 days
- Visible results across all age groups, including patients over 60
- No reported allergic reactions or side effects
How Rh Collagen Compares to Other Collagen-Stimulating Technologies
Compared to other collagen-stimulating approaches such as microneedling, HIFU, radiofrequency, polynucleotides, or hyaluronic acid skin boosters, Rh Collagen falls into the Hybrid Products category (HA + Collagen), offering high safety and application-range scores alongside moderate-to-high collagen stimulation and low inflammation — a strong balance between efficacy and safety.
Safety Profile of Rh Collagen
Rh Collagen is designed with the following properties:
- Non-allergenic, with no harmful adverse reactions, and non-cardiogenic and non-toxic
- Safe and easy to use, offering high versatility with a very low complication rate
Synergy of Formula: The Role of Carboxymethyl Cellulose (CMC)
Rh Collagen formulations often include Carboxymethyl Cellulose (CMC), a biosynthetic substance used as an excipient in many drugs and as a carrier in numerous dermal fillers. CMC is of non-bacterial and non-animal origin, giving it distinct properties, including three key functions:
- Anti-aging effect within the dermis
- Inhibits the hyaluronidase enzyme, preserving endogenous hyaluronic acid within tissue so it can continue its deep hydration and tissue-repair activity
- Slows the action of MMPs (Matrix Metalloproteinases), enzymes responsible for degrading Type I collagen and unwinding its triple helix structure
Summary
Rh Collagen (rhCOL1A1) represents a distinct approach compared to conventional fillers — rather than simply adding volume, it signals the skin to produce its own collagen through a complex biomolecular mechanism, backed by clinical data on both safety and efficacy. If you'd like to learn more about Rh Collagen or find out whether it's suitable for your skin, you're welcome to consult with Dr. Pun at Drema Clinic.