Peptides are short amino acid chains that form proteins (especially collagen, elastin and keratin), the building blocks of skin structure. Peptides are among the biomimetic ingredients that play an important role in supporting fibroblast activity, collagen synthesis and skin quality by supporting cellular signaling mechanisms. Peptides work like a conductor under the skin as smart molecules that provide the right repair for the right need. However, “peptide” is not a single ingredient. Peptides with different amino acid sequences are developed to target different biological processes in the skin.
Some give signals related to collagen and the extracellular matrix (the skin’s support network), while others take on a carrier role. Some modulate enzyme activities, while others focus on neurotransmitter mechanisms associated with expression lines.
Therefore, what matters today is not only using peptides, but knowing which peptide is intended for which biological target.
What Is a Biomimetic Peptide?
Biomimetic peptides are peptides developed by taking inspiration from the skin’s natural biological mechanisms and cellular communication processes.
Simply put, they can be thought of as small amino acid chains that try to mimic the skin’s natural communication language or draw inspiration from these processes.
Biomimetic peptides should be regarded not as a single type of peptide but as an important approach of modern active ingredient technology.
So what does each peptide do?
The 4 Main Groups of Peptides Used in Skin
1. Signal Peptides: Renewal Message for the Skin
Signal peptides are developed to support biological processes related to collagen, elastin and other structural components found in the skin’s extracellular matrix.
Palmitoyl Pentapeptide-4
One of the most studied signal peptides is Palmitoyl Pentapeptide-4 (Pal‑KTTKS). It improves fine lines and wrinkle appearance.
Palmitoyl Tripeptide-5
Another peptide used to support collagen‑related biological processes.
Tripeptide-38
It is one of the biomimetic peptides that target biological processes associated with different components of the extracellular matrix.
It aims to improve skin smoothness and wrinkle appearance.
Signal peptides are a group of peptides aimed at supporting the skin’s structural integrity and renewal processes.
2. Carrier Peptides: Transporting Necessary Components to the Target
One of the best‑known examples of carrier peptides is Copper Tripeptide-1 (GHK‑Cu).
This peptide forms a complex with copper, helping copper be used in biological processes. Copper is one of the cofactors required for the activity of some enzymes involved in collagen and elastin formation.
Basic idea of carrier peptides:
Peptide + carried component + targeted biological process.
3. Enzyme Inhibitor Peptides: Approaching the Biological Processes of Skin Aging
Some peptides are developed to modulate the activity of specific enzymes associated with skin aging.
For example, certain peptides target processes related to enzymes that play a role in the breakdown of dermal structures such as collagen and elastin.
The main goal of this approach is not only to support new tissue synthesis but also to target biological processes that can help preserve the existing dermal structure.
Therefore, enzyme inhibitor peptides are among the complementary components of multi‑peptide formulations developed against skin aging.
4. Neurotransmitter‑Active Peptides: A Different Approach to Expression Lines
Not all peptides work on collagen.
Neurotransmitter‑active peptides such as Acetyl Hexapeptide‑8 are developed on mechanisms that target the appearance of dynamic expression lines related to repeated facial muscle movements.
For this reason, some peptides are described in cosmetic mesotherapy literature as “botulinum‑like” or, more commonly, botox‑like peptides.
Why Are Biomimetic Peptides Important?
Skin aging does not arise from a single mechanism.
Loss of collagen and elastin, changes in the extracellular matrix, moisture loss, oxidative stress and repeated mimic movements all play roles simultaneously.
Therefore, using multiple peptides that target different biological targets together offers a multi‑target approach instead of a single active.
For example, in a formulation:
- Signal peptide → dermal structure and collagen support
- Carrier peptide → supports transport of cofactors (binding to minerals such as copper that help enzymes work)
- Enzyme inhibitor peptide → approach aimed at preserving dermal structures
- Neurotransmitter‑active peptide → approach aimed at the appearance of expression lines
different targets can be combined in this way.
This is one of the reasons why new‑generation mesotherapy products with high peptide content attract attention today.
From the Peptide Revolution to Biomimetic Peptide Technology
It is no longer sufficient to consider peptides only as “anti‑aging ingredients.”
They are a broad family of molecules developed to target various biological processes of the skin.
Biomimetic peptide technology brings all these approaches together in a perspective inspired by the skin’s natural biology.
Therefore, the question in the new‑generation mesotherapy approach is no longer just:
“Is there a peptide?”
It is “Which peptide is present, what biological target is it aimed at, and with which other peptides is it used?”
The future approach to skin rejuvenation is shaped by multi‑peptide technologies that match the right peptides with the right biological targets, rather than searching for a single “miracle ingredient.”