When scientists from the University of Manchester and the brand No7 announced the creation of a "superpeptide," the cosmetic community reacted with mixed feelings: some spoke of a revolution, others of marketing. But behind the loud headlines lies some truly interesting chemistry. We are talking about a fundamentally new approach to how collagen and peptides for the skin work: not just delivering building materials, but precisely activating the dermis's own repair mechanisms. For a formulator who wants to understand their ingredients beyond the advertising brochures, this story is a great opportunity to delve into the molecular logic of peptide cosmetics and learn how to use them consciously.
What are matrix peptides and why did they appear
The classic idea of "apply collagen to the skin — the skin will become younger" has long been recognized as naive. The native collagen molecule is too large (about 300 kDa) to penetrate the stratum corneum. It was this contradiction that became the starting point for the development of peptide analogs.
Matrix peptides are short amino acid sequences (usually from 2 to 10 units) that either copy fragments of natural extracellular matrix proteins or mimic signaling molecules that trigger the synthesis of these proteins. The key word here is "signaling." The skin does not receive ready-made collagen; it receives a command to produce it.
Matrix metalloproteinases and the feedback loop
When the dermis is damaged — mechanically, photochemically, or through inflammation — matrix metalloproteinases (MMPs) break down collagen. The resulting fragments, called matrikines, serve as a signal to fibroblasts: "synthesize new matrix." It is this feedback loop that modern biomimetic peptides exploit. They pretend to be products of collagen degradation without causing actual damage, thereby triggering the synthetic activity of cells.
The role of machine learning in finding new sequences
Traditional screening of peptide libraries is an expensive and slow process. No7 researchers took a different approach: machine learning algorithms analyzed thousands of natural sequences released from collagen and elastin-containing proteins during enzymatic degradation and predicted which of them had the greatest potential for activating matrix remodeling. Then, the most promising candidates were tested using omics technologies — transcriptomics and proteomics — to assess the real impact on the expression of skin proteins.
The result was a combination of two synthetic tetrapeptides: pal-GPKG and pal-LSVD. Each of them carries a palmitoyl group (pal-), which increases lipophilicity and, accordingly, the ability to penetrate the stratum corneum. Together, they activate the expression of more than 50 key proteins — including type I collagen and fibrillin, which is responsible for the elasticity and firmness of the skin.
Collagen and peptides for skin: what lies behind INCI terminology
In a formulator's recipes, peptides appear under various INCI names, and it is not easy to navigate them without basic knowledge. Conceptually, the entire peptide arsenal can be divided into several functional groups.
Signal peptides
The most well-known representatives are Palmitoyl Pentapeptide-4 (Matrixyl) and Copper Tripeptide-1 (GHK-Cu). They activate fibroblasts and stimulate the production of collagen, elastin, and hyaluronan. The new No7 superpeptide belongs to this category: its mechanism of action is similar, but the molecular target and sequence are fundamentally new.
Neuromodulating peptides
Acetyl Hexapeptide-3 (Argireline) and its analogs block the release of neurotransmitters at the neuromuscular synapse, reducing facial tension. They are often called "Botox in a jar," although the mechanism is fundamentally different and the effect is significantly milder. It is important to understand: these peptides do not directly affect collagen synthesis — they work at the level of muscle tone.
Carrier peptides
GHK-Cu is an example of a peptide that simultaneously transports copper to enzymes (lysyl oxidase, superoxide dismutase) and possesses signal activity itself. Copper is necessary for the cross-linking of collagen and elastin fibers, so a deficiency of this trace element in the dermis directly affects the mechanical properties of the skin.
Formulation practice: how to work with peptides in a home laboratory
Understanding biochemistry is half the battle. The other half is correctly incorporating peptides into a formula. This is where formulators often encounter several typical mistakes.
Temperature and pH: the two main enemies of peptides
Most peptides are thermolabile. They should be added to the water phase at a temperature no higher than 40 °C, and in emulsions, strictly during the cooling phase. Violating this rule leads to partial denaturation and loss of activity.
The pH of the medium is no less critical. The optimal range for most signaling peptides is 5.0–6.5. At lower values, acid hydrolysis of peptide bonds is possible; at higher values, alkaline degradation occurs. This is precisely why controlling the pH of the finished formula is not a formality, but a prerequisite for efficacy. Read more about how to correctly measure and adjust acidity in our article pH in Cosmetics: A Basic Guide for Formulators.
Concentrations and Compatibility
Manufacturers of peptide actives generally recommend working concentrations of 0.5% to 5% of the finished solution (provided that the solution itself contains 0.001–0.01% of the pure peptide). Exceeding the concentration does not enhance the effect — receptor saturation is biologically limited.
Incompatibility of peptides with certain ingredients is a real issue:
- Acids (AHA, BHA) at low pH can hydrolyze peptide bonds — avoid combining them in the same phase.
- Cationic polymers (e.g., polyquaternium) can form complexes with anionic peptides, reducing bioavailability.
- Oxidizing agents (hydrogen peroxide, certain preservatives) destroy cysteine-containing peptides.
- Metals in high concentrations (iron, zinc) compete with copper in GHK-Cu, disrupting its transport function.
Example of a Basic Serum with a Peptide Complex
Below is a tentative formulation for an aqueous serum optimized for peptide actives. This is a starting point for experiments, not a final formula:
- Distilled water — up to 100%
- Glycerin (humectant) — 3–5%
- Sodium hyaluronate (low molecular weight) — 0.1–0.2%
- Niacinamide — 3–5% (synergist for collagen synthesis)
- Palmitoyl Tripeptide-1 / Palmitoyl Tetrapeptide-7 (Matrixyl 3000) — 3–5% solution
- Panthenol — 1–2%
- Preservative (Euxyl PE 9010 or equivalent) — per manufacturer's recommendation
- Adjust pH to 5.5–6.0 with citric acid or NaOH
If you are just starting your journey in cosmetic chemistry, we recommend first getting acquainted with the basics through our article How to Become a Cosmetic Chemist: The Path from Curiosity to Professional Formulation — it will help you build a systematic understanding of the process.
Superpeptide No. 7: What This Means for the Industry and Formulators
The story of the superpeptide pal-GPKG/pal-LSVD is interesting not only as scientific news but also as a methodological precedent. For the first time, peptide sequences for cosmetics were found not through random screening, but through targeted computational analysis of the skin's natural peptidome. This changes the speed and precision of development.
What is especially important is that the new peptide complex demonstrates high tolerability even for sensitive skin. Retinoic acid, traditionally considered the gold standard of anti-ageing therapy, often causes irritation, flaking, and photosensitization. Peptides are free of these side effects: they work through receptor mechanisms rather than through direct influence on gene regulation, as retinoids do.
For formulators, this means the following: peptide technologies are becoming an increasingly accessible alternative to aggressive actives. There are already commercial peptide complexes on the market inspired by the same logic — the imitation of matrikines. Keep an eye out for new INCI names: pal-GPKG and pal-LSVD will soon appear in supplier catalogs.
Collagen and peptides for skin in the context of complex formulation
Peptides do not work in a vacuum. Their effectiveness is largely determined by how skillfully the entire cream formula is built around them.
Texture bases and bioavailability
Water-based serums are the most predictable base for peptides. However, palmitoylated forms (pal-peptides) have increased lipophilicity, which opens up possibilities for their inclusion in light oil-in-water emulsions. If you are interested in anhydrous formulation, study our material Anhydrous products: A complete guide for beginners — it details the logic of anhydrous systems, which can also serve as carriers for oil-soluble actives.
Synergy with other actives
Niacinamide (vitamin B3) is one of the best synergists for peptide complexes. It independently stimulates collagen synthesis, reduces inflammation, and improves barrier function, creating an environment in which peptides work more effectively. Ascorbic acid (vitamin C) is a cofactor for prolyl hydroxylase, an enzyme without which collagen cannot fold correctly. However, pH balance is important here: ascorbic acid requires a pH below 3.5 for stability, which conflicts with the optimum for most peptides. The solution is to separate them into different products or use stabilized vitamin C derivatives.
To understand how rheological modifiers affect the feel and distribution of actives on the skin, we recommend reading our analysis Tribology, gums, and gelling agents — this will help you choose the right texture base for a peptide serum.
Stability and storage
Finished peptide products should be stored in dark bottles at a temperature of 4–20 °C. Ultraviolet light and heat are the main factors of degradation. If you are working with peptides in the form of lyophilized powders, dissolve them immediately before adding them to the formula and do not subject them to repeated freeze-thaw cycles.
FAQ
Can I use several peptides simultaneously in one formula?
Yes, combining peptides with different mechanisms of action is a common practice. For example, combining a signal peptide (Matrixyl) with a neuromodulating one (Argireline) and a carrier peptide (GHK-Cu) theoretically targets several biological pathways at once. The main thing is to monitor the total concentration, the pH of the formula, and ensure there are no chemical conflicts between the components. Start with the minimum recommended dosages and test the stability of the finished product.
Why are synthetic peptides better than collagen hydrolysate in cosmetics?
Collagen hydrolysate is a mixture of short peptides and amino acids obtained through the enzymatic breakdown of animal or marine collagen. It moisturizes the skin surface well and forms a film, but its biological activity is unpredictable: the composition varies from batch to batch. Synthetic peptides with a known sequence are standardized molecules with a studied mechanism of action, predictable concentration, and reproducible effect. That is why collagen and peptides for skin in modern cosmetics are primarily synthetic biomimetics, not native protein.
How long do I need to use peptide products to see results?
The synthesis of new collagen is not a fast process. Clinical studies of most peptide actives show the first measurable changes in skin density and elasticity after 4–8 weeks of regular use. The visible cosmetic effect is generally assessed after 12 weeks. This is important to consider when developing products: peptide cosmetics require consistent use, not one-off application.
Peptide chemistry is one of the most dynamically developing fields of cosmetic science. What seemed like pharmaceutical exoticism just ten years ago is now available to formulators in the form of standardized commercial actives. And the use of machine learning to search for new sequences means that the pace of new peptide ingredient emergence will only accelerate. Understanding their chemistry, mechanisms, and formulation rules means being one step ahead.
If you want to master working with peptides, emulsions, and active ingredients systematically, rather than through scattered articles — the Walker Formulation Academy Club provides access to structured materials, formula breakdowns, and a community of practising formulators. Learn more about our courses and start formulating consciously.
