Sodium Caprylate

Sodium caprylate is the sodium salt of caprylic acid, a naturally occurring fatty acid with an eight-carbon chain. It functions primarily as an emulsifier and surfactant in skincare formulations, helping to stabilise oil and water-based ingredients so they remain evenly mixed.Beyond its role as a formulation stabiliser, sodium caprylate has been studied for its potential to enhance the delivery of certain active ingredients through the skin barrier, which may broaden its application in therapeutic skincare products.

As an emulsifier, sodium caprylate works by positioning itself at the boundary between oil and water molecules, allowing these immiscible substances to blend smoothly. This prevents separation and ensures a uniform texture throughout the product's shelf life.Research suggests sodium caprylate may also interact with the skin barrier in ways that facilitate the passage of certain active ingredients. The mechanism appears to involve temporary modification of skin permeability, though the precise nature of this interaction requires further investigation.

Sodium caprylate is primarily a formulation ingredient rather than an active you apply strategically. Simply use your product as directed. If you are using a formulation specifically designed to enhance penetration of other actives, introduce it gradually to assess tolerance, particularly if you have sensitive skin.

Sodium caprylate is generally well-tolerated and recognised as safe in cosmetic formulations at typical use levels. Those with known sensitivity to fatty acid salts should perform a patch test first.