Science
Mechanism of Action
This ingredient functions as an anionic surfactant, leveraging its amphiphilic structure, which consists of a hydrophobic fatty acyl tail and a hydrophilic sarcosinate head. This design enables it to effectively interact with and remove oils and dirt from skin and hair. Additionally, it can improve hair's body, suppleness, sheen, and texture, and significantly enhance the transdermal delivery of co-formulated active ingredients.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Clinical irritation and sensitization studies indicate safety at concentrations up to 5%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Acyl sarcosinate salts demonstrate superior water solubility compared to traditional soaps. This ingredient maintains performance across a pH range of 5 to 9 and exhibits high thermal stability, with the amide linkage resisting hydrolysis up to 100°C. The carboxylate group becomes negatively charged at pH values greater than approximately 5.5.
Conflicts
- Must not be used in formulations where N-nitroso compounds could potentially form, as sarcosine can be nitrosated into N-nitrososarcosine, a known carcinogen.
- Exercise caution when combining with ingredients whose safety profile relies on minimal skin absorption, as Sodium Oleoyl Sarcosinate can significantly enhance penetration.
- Potential for poor compatibility with certain skincare actives, such as acids or enzymes, which may compromise formulation stability or efficacy.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed acyl sarcosines and sarcosinates, including Sodium Oleoyl Sarcosinate, safe for use in rinse-off products. For leave-on products, it is considered safe at concentrations up to 5%, provided the final formulation is non-irritating. Regulatory guidelines in Europe permit its use under the general provisions of the EU Cosmetics Regulation. The FDA has approved related N-Acyl Sarcosines for use as anti-static and anti-fogging agents in food packaging materials.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Oleoyl Sarcosinate is a valuable surfactant and conditioning agent, safe for use in precision formulations up to 5% in leave-on products, offering both cleansing and skin penetration enhancement benefits.
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References
Sources