Acetyl Dipeptide-1 Cetyl Ester for Sensitive Skin and Comfort Formulations
When formulating for reactive, post-procedure, or discomfort-prone skin, ingredient selection matters more than layering actives. Acetyl Dipeptide-1 Cetyl Ester, known commercially as Calmosensine, is a lipophilic dipeptide designed to mimic endorphin receptor activation at the skin level. The cetyl ester modification gives this peptide oil-phase compatibility, which is uncommon among bioactive peptides and opens formulation options that water-soluble peptides cannot access. We supply this ingredient from Valencia, Spain, with full documentation for EU cosmetic formulation. It fits well in products targeting comfort, soothing, and skin tolerance — categories that continue to grow as consumers report increased skin sensitivity.
Mechanism of Action and Study Data
Acetyl Dipeptide-1 Cetyl Ester acts through opioid receptor modulation at the peripheral nerve ending level in the skin. The acetyl-dipeptide portion mimics the binding motif of enkephalins, naturally occurring peptides that modulate pain and discomfort perception. By engaging mu-opioid receptors on sensory nerve fibers in the epidermis, the peptide reduces the signaling cascade responsible for itch, sting, and tightness sensations. This is a peripheral (not systemic) effect, limited to the application area.
In a 14-day panel study with 30 volunteers using a 2% active solution in a test cream, skin sensitivity scores decreased by 47% compared to the vehicle-only control. Panelists reported measurable improvements in comfort perception, with reduced stinging response to a lactic acid challenge (LAST test). The onset of effect was noted within the first 3 days for most subjects. Separate in-vitro work on keratinocyte cultures showed a dose-dependent reduction in pro-inflammatory cytokine release (IL-1 alpha), supporting an anti-irritation mechanism beyond simple sensory masking.
Formulation Guide
Use Acetyl Dipeptide-1 Cetyl Ester at 1-3% of the active solution in your finished formulation. Because the cetyl ester makes this peptide lipophilic, it should be added to the oil phase of emulsions or dissolved with gentle warming (35-40°C) in lipophilic carriers such as caprylic/capric triglyceride, isopropyl myristate, or similar esters. It does not require an aqueous co-solvent.
The stable pH range is 4.5 to 7.0. It is compatible with common emulsifiers, preservatives, and other actives used in sensitive-skin formulations. Pair it with Ectoin for barrier reinforcement or with Copper Tripeptide-1 in post-procedure recovery products. Target applications include post-laser recovery creams, sensitive skin moisturizers, rosacea-prone skin formulations, and mens aftershave balms where sting reduction is a primary consumer need.
Frequently Asked Questions
Is Acetyl Dipeptide-1 Cetyl Ester a drug or does it have systemic opioid effects?
No. The peptide acts locally on peripheral opioid receptors in the skin. The molecular weight (412.57 g/mol) and lipophilic ester tail limit systemic absorption. It is classified as a cosmetic ingredient under EU regulation, not a pharmaceutical. There is no central nervous system activity at cosmetic use levels.
Can I combine it with retinoids or AHAs in the same formula?
Yes, and this is a practical use case. Adding 1-2% active solution to formulations containing retinol, glycolic acid, or other potentially irritating actives can improve consumer tolerance and reduce the dropout rate in product testing panels. The comfort-enhancing effect helps offset the sting or tightness these actives sometimes cause.
How does it compare to other soothing ingredients like bisabolol or allantoin?
The mechanism is fundamentally different. Bisabolol and allantoin act primarily as anti-inflammatory agents at the cellular level. Acetyl Dipeptide-1 Cetyl Ester modulates sensory nerve signaling — it reduces the perception of discomfort rather than only reducing inflammation. In practice, combining both approaches (nerve-level comfort plus anti-inflammatory) produces a more complete soothing effect.
What stability considerations should I keep in mind?
The peptide is stable in finished formulations within pH 4.5-7.0 at normal storage temperatures. Avoid prolonged exposure above 45°C during manufacturing. Standard accelerated stability testing (40°C/75% RH for 3 months) is recommended. The raw material itself should be stored below 25°C, protected from light, in its original sealed container.
Is it suitable for leave-on and rinse-off products?
It works best in leave-on formats (creams, serums, balms) where skin contact time is sufficient for receptor engagement. Rinse-off products like cleansers have limited contact time, reducing efficacy. If used in rinse-off, increase to the higher end of the dosage range (3%) to compensate.
Specifications
| Parameter | Value |
|---|---|
| INCI Name | Acetyl Dipeptide-1 Cetyl Ester |
| CAS Number | 196604-48-5 |
| Molecular Weight | 412.57 g/mol |
| Purity | ≥95% (HPLC) |
| Solubility | Oil-soluble (lipophilic) |
| Recommended pH | 4.5 – 7.0 |
| Use Level | 1-3% active solution |
| Storage | Below 25°C, protect from light |
| Certifications | CoA per lot, EU cosmetic grade |
Related Products
These ingredients pair well in sensitive skin and recovery formulations:
- Copper Tripeptide-1 – wound healing and skin repair peptide for post-procedure use
- Ectoin – extremolyte for barrier protection and anti-inflammatory support
Order and Supply
TCS Peptides supplies Acetyl Dipeptide-1 Cetyl Ester from our warehouse in Valencia, Spain. Standard EU delivery takes 5-7 business days. Every shipment includes a Certificate of Analysis.
For pricing, sample requests, or formulation support, reach us by email at info@tcspeptides.com or via WhatsApp (+34 672929362). Our team can advise on incorporation methods for your specific formulation type.