Sodium Sarcosinate

Sodium sarcosinate is a surfactant—a cleaning agent—derived from sarcosine, an amino acid naturally found in the body. It belongs to a family of mild surfactants known as acyl sarcosinates, which are created by combining sarcosine with fatty acids. This chemical modification makes it more soluble and better suited for cosmetic formulations than its parent fatty acids.In skincare and hair products, sodium sarcosinate functions as a cleanser and conditioning agent. It helps remove oils and impurities from the skin and scalp whilst also contributing to the texture and consistency of formulations.

As a surfactant, sodium sarcosinate has a molecular structure that allows it to bind to both water and oil. This dual affinity enables it to surround oil-based dirt and makeup, suspending them so they can be rinsed away with water. Its mild nature means it achieves this without excessively disrupting the skin's natural lipid barrier.The conditioning component of this ingredient helps to seal moisture into the skin, which is why it appears frequently in cleansing formulations designed for drier or sensitive skin types.

Sodium sarcosinate is typically used in rinse-off cleansers, so it is applied to damp skin, massaged gently, and thoroughly rinsed. It can be used daily as part of a regular cleansing routine. If you have sensitive skin or experience any irritation, patch test first and consider using it once daily rather than twice daily until your skin adjusts.

Sodium sarcosinate is generally well-tolerated and considered safe for cosmetic use. As with any cleansing agent, it may cause irritation in sensitised or compromised skin if concentration is too high or formulation pH is not balanced; patch testing is advisable if you have reactive skin.