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Palmitoyl tetrapeptide-3 (Tego pep) is a synthetic lipophilic signaling peptide. Modified with lipophilic palmitoyl groups, it overcomes the poor transdermal penetration of conventional water-soluble polypeptides and efficiently permeates the epidermal and dermal layers of the skin, delivering multiple bioactivities including anti-inflammation, anti-aging and cutaneous microcirculation regulation. Unlike traditional anti-aging actives, it does not merely boost collagen synthesis; it also targets cutaneous inflammatory factors and lymphatic circulation.
It serves as a core raw material in skincare products designed to reduce periorbital edema and under-eye bags. Characterized by mild efficacy and broad skin compatibility, it is widely incorporated into premium eye care, anti-aging and skin-repairing cosmetics, and represents a key peptide candidate under research for cutaneous microcirculation modulation.
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Palmitoyl Tetrapeptide-3 COA
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| Certificate of Analysis | ||
| Compound name | Palmitoyl Tetrapeptide-3 | |
| Grade | Pharmaceutical grade | |
| CAS No. | 1228558-05-1 | |
| Quantity | 30g | |
| Packaging standard | PE bag+Al foil bag | |
| Manufacturer | Shaanxi BLOOM TECH Co., Ltd | |
| Lot No. | 202601090056 | |
| MFG | Jan 9th 2026 | |
| EXP | Jan 8th 2029 | |
| Structure |
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| Item | Enterprise standard | Analysis result |
| Appearance | White or almost white powder | Conformed |
| Water content | ≤5.0% | 0.32% |
| Loss on drying | ≤1.0% | 0.28% |
| Heavy Metals | Pb≤0.5ppm | N.D. |
| As≤0.5ppm | N.D. | |
| Hg≤0.5ppm | N.D. | |
| Cd≤0.5ppm | N.D. | |
| Purity (HPLC) | ≥99.0% | 99.98% |
| Single impurity | <0.8% | 0.26% |
| Total microbial count | ≤750cfu/g | 450 |
| E. Coli | ≤2MPN/g | N.D. |
| Salmonella | N.D. | N.D. |
| Ethanol (by GC) | ≤5000ppm | 500ppm |
| Storage | Store in a sealed, dark, and dry place below 2-8°C | |
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Mechanism of Lymphatic Microcirculation and Periorbital Edema Regulation
Core Pathological and Physiological Triggers of Periorbital Edema
The periorbital region features the thinnest skin, loosest subcutaneous connective tissue, and densest distribution of blood and lymphatic vessels across the human body. Its skin thickness equals only one-third of that on other facial areas, paired with a thin subcutaneous fat layer and sparse fibrous supporting structures lacking restraint and fixation from dense connective tissue. This unique anatomical configuration renders periorbital tissues highly susceptible to fluid accumulation, triggering edema and protruding under-eye bags.
Physiologically, periorbital edema arises from the synergistic action of four core drivers: disturbed blood microcirculation, impaired lymphatic drainage, infiltration of inflammatory mediators, and unbalanced tissue osmotic pressure. Chronic late nights, excessive eye strain, ultraviolet radiation, and external irritants continuously damage microvascular endothelial cells around the eyes, abnormally elevating capillary permeability. Water and trace plasma proteins leak persistently from blood vessels into subcutaneous interstitial spaces, disrupting the dynamic balance between interstitial fluid generation and drainage.
Targeted Restoration of Periorbital Lymphatic Microcirculation Pathways
Palmitoyl tetrapeptide-3 regulates lymphatic microcirculation through multi-target intervention, repairing damaged periorbital lymphatic networks and restoring normal interstitial fluid drainage and metabolism to fundamentally resolve fluid retention.
First, the active ingredient specifically acts on periorbital lymphatic endothelial cells to stimulate their proliferation and repair activity. It restores damaged lymphatic vessel wall architecture, enhances wall integrity and elasticity, and corrects permeability disorders caused by inflammation and external irritants to mitigate abnormal lymphatic leakage.
It also modulates the contraction rhythm of lymphatic smooth muscle, boosts the pumping efficiency of superficial lymphatic vessels, accelerates drainage of stagnant interstitial fluid and metabolic waste around the eyes, and rapidly alleviates acute edema.
Second, tego pep modulates signaling pathways governing lymphatic microcirculation to promote moderate expression of Granulocyte Chemotactic Protein-2 (GCP-2).
It precisely recruits immune scavenger cells to damaged periorbital areas to clear accumulated metabolic debris and mild inflammatory deposits within lymphatic lumens, unclog micro-occlusions and fully relieve lymphatic stasis.
Conventional moisturizing and de-puffing ingredients only temporarily discharge surface moisture for short-term relief. In contrast, this peptide remodels periorbital lymphatic microcirculation from three dimensions: structural restoration, pathway unclogging and functional activation, delivering long-lasting anti-edema effects.
Inhibition of Inflammation-Mediated Edema Cascade Reactions
Inflammatory responses constitute the primary driver of persistent periorbital edema and a critical aggravator of microcirculatory dysfunction. Tego pep exerts potent anti-inflammatory activity to block cascade amplification of edema and break the vicious swelling cycle.
Studies confirm the ingredient markedly suppresses IL-6 secretion in cutaneous keratinocytes and downregulates UVB and external irritant-triggered inflammatory skin responses, reducing sustained damage to periorbital microvessels and lymphatic ducts from inflammatory factors.
Massive release of inflammatory factors induces persistent microvascular dilation and widening of endothelial gaps, causing continuous extravasation of plasma water and proteins. This further elevates interstitial osmotic pressure and attracts additional fluid retention. By blocking inflammatory signal transduction, palmitoyl tetrapeptide-3 lowers abnormal microvascular permeability, curbs excessive interstitial fluid generation and eliminates the root substrate for edema formation.
It also suppresses infiltration and aggregation of dermal inflammatory cells to mitigate inflammatory swelling of periorbital tissues and relieve inflammatory compression on lymphatic vessels, creating unobstructed tissue conditions for lymphatic drainage. Additionally, it repairs the dermoepidermal junction and strengthens the skin barrier to reduce repeated periorbital tissue damage from external irritants and lower edema recurrence risk, achieving synergistic anti-inflammatory and de-puffing benefits.
Balancing Tissue Osmotic Pressure and Reinforcing Subcutaneous Supporting Structures
Unbalanced tissue osmotic pressure and insufficient subcutaneous support are major contributors to lingering periorbital edema and permanent under-eye bags. By modulating matrix protein synthesis, tego pep bidirectionally balances osmotic pressure and strengthens tissue support to consolidate de-puffing efficacy.
On one hand, as a classic signaling peptide, it significantly stimulates dermal synthesis of Type I and Type IV collagen, elastin, hyaluronic acid and glycosaminoglycans. Abundant matrix proteins densify the periorbital dermis, tighten loose subcutaneous connective tissue, boost skin support and firmness, and narrow interstitial gaps to physically limit abnormal fluid accumulation and recurrent swelling.
On the other hand, ordered matrix protein synthesis precisely modulates colloid osmotic pressure in periorbital tissues, balancing fluid exchange dynamics among blood vessels, interstitial spaces and lymphatic ducts to prevent abnormal fluid pooling from isolated osmotic imbalances and sustain microcirculatory homeostasis. Elastin repair and regeneration also ameliorate periorbital skin laxity and fine lines, fading sagging residual after edema subsides and delivering combined benefits of de-puffing, skin firming and under-eye bag reduction. With long-term application, the ingredient fundamentally corrects inherent weaknesses of weak periorbital microcirculation and lax edema-prone tissues, resolving periorbital swelling at the physiological structural level.
Synergistic Mechanisms of Microcirculation Modulation
The periorbital edema-regulating efficacy of tego pep stems from synergistic interplay of four core mechanisms: lymphatic repair, anti-inflammatory stabilization, structural reinforcement and osmotic pressure balancing, forming a closed-loop regulatory system.
Short-term effects: Rapidly unclogs stagnant lymphatic vessels, accelerates interstitial fluid drainage and suppresses acute inflammatory edema to swiftly alleviate morning puffiness and eye strain-induced periorbital swelling.
Medium-term effects: Repairs damaged microvascular and lymphatic endothelial architecture, stabilizes vascular permeability, breaks the inflammatory-edema cycle and reduces edema flare-up frequency.
Long-term effects: Remodels subcutaneous periorbital supporting structures, optimizes microcirculatory homeostasis to eliminate persistent edematous under-eye bags, with auxiliary anti-aging and wrinkle-reducing activity.
Compared with fast-acting de-puffing ingredients such as caffeine and witch hazel, tego pep achieves natural swelling relief via physiological function restoration rather than forced dehydration. Mild and non-irritating, it avoids damage to delicate periorbital skin and suits long-term eye care regimens - its core competitive advantage as a premium anti-edema raw material for eye formulations. Extensive skincare mechanism research and clinical application data verify that continuous use of eye care products containing tego pep markedly improves periorbital lymphatic drainage efficiency, lowers edema incidence, and elevates the firmness and elasticity of periorbital skin.
Core Solid-Phase Peptide Synthesis Process
Palmitoyl tetrapeptide-3 is predominantly manufactured via 2-CTC resin solid-phase synthesis, a mature industrial technology featuring streamlined workflows, high product purity and scalability for mass production.
Resin Activation: Swell and activate cross-linked 2-CTC resin in dichloromethane solution.
Peptide Backbone Assembly: Perform sequential coupling reactions with Fmoc-protected amino acids to sequentially link arginine, proline, glutamine and glycine to construct the GQPR tetrapeptide scaffold. Piperidine solution removes Fmoc protecting groups after each coupling step, followed by thorough washing to eliminate residual impurities.
Palmitoylation Modification: Introduce palmitoyl chloride to carry out terminal palmitoylation upon completion of tetrapeptide synthesis, conferring lipophilicity to the target molecule.
Cleavage and Crude Product Isolation: Prepare trifluoroacetic acid-based composite cleavage solution to break covalent bonds between the resin and peptide chain. Precipitate the crude product with diethyl ether, then centrifuge and dry the precipitate.
Purification and Finishing: Purify the crude extract via reversed-phase high-performance liquid chromatography (RP-HPLC) and lyophilize to obtain finished tego pep with purity exceeding 95%. Products from this process exhibit strong stability and high bioactivity retention, meeting quality standards for cosmetic raw materials.
References
- Li Qian, Zhang Zhongqi, Guo Tian, et al. Solid-Phase Synthesis of Palmitoyl Tetrapeptide-7[J]. Biochemical Engineering, 2018,4(1):58-60.
- MedChemExpress. Palmitoyl Tetrapeptide-3 (CAS:221227-05-0) Product Technical Data[EB/OL]. 2026.
- Schagen S K. Topical peptide treatments with effective anti-aging results[J]. Cosmetics, 2017, 4(2): 16.
- Huaxueshuwang. Synthetic Routes and Functional Mechanisms of Palmitoyl Tetrapeptide-3[EB/OL]. 2026-06-17.
- Fengzhu Li, et al. Clinical evidence of the efficacy and safety of a new multi-peptide anti-aging topical eye serum[J]. Journal of Cosmetic Dermatology, 2023,22(12):3340-3346.
FAQ
What is palmitoyl Tripeptide 3?
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Palmitoyl Tripeptide-3, also known as Palmitoyl Tripeptide-3, is an advanced cosmetic ingredient that is frequently used in skincare products. This peptide, composed of three amino acids, has the ability to stimulate collagen production and improve skin elasticity.
Does it affect normal skin immune function?
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No. It features bidirectional immune regulation without immune suppression side effects. It only inhibits excessive immune hyperactivity and abnormal inflammatory responses induced by external irritation, reducing inflammatory cell infiltration and skin redness. Meanwhile, it moderately activates the skin's innate immune capacity, accelerates the clearance of inflammatory metabolites and damaged cells, and promotes skin tissue repair. It balances skin immune homeostasis without weakening the skin's natural defense barrier, which is safer than hormonal and broad-spectrum anti-inflammatory ingredients.
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