The promoting effect of phospholipids on permeation

The stratum corneum serves as the primary barrier of human skin, blocking the transdermal delivery of most functional actives. Many skincare active substances struggle to pass through epidermal tissues effectively, remaining stranded on the skin surface and failing to reach target action sites, which greatly limits the actual efficacy of skincare formulations. As amphiphilic biomaterials with structures similar to skin cell membranes, phospholipids exhibit remarkable permeation-promoting capacity. They can assist active ingredients in crossing the epidermal barrier and improve transdermal transport efficiency, becoming a vital carrier material for developing high-efficiency transdermal skincare systems.

The transdermal performance of phospholipids originates from their inherent molecular structure. Phospholipid molecules contain hydrophilic head groups and hydrophobic fatty acid chains, which are highly homologous to the lipid bilayer constituting epidermal cell membranes. When applied to the skin surface, phospholipids can fuse with intercellular lipids in the stratum corneum, temporarily adjusting the arrangement density of lipid molecules and forming reversible transport channels. Different from chemical penetration enhancers that damage the skin barrier, phospholipids rely on biomembrane fusion to promote penetration without destroying the integrity of the stratum corneum, which conforms to the development trend of mild and clean skincare.

There are two core pathways for phospholipids to boost active ingredient penetration. For lipophilic active substances, phospholipids can wrap the actives to form liposome structures. The lipophilic core accommodates oil-soluble components, and the outer phospholipid bilayer is compatible with epidermal lipids, guiding actives to pass through intercellular lipid pathways. For water-soluble functional ingredients, phospholipids build stable emulsion systems to reduce the surface tension of the formula, lowering the resistance of water-soluble substances when passing through the hydrophobic epidermal barrier. In addition, phospholipids can slow down the volatilization and loss of active ingredients on the skin surface, prolonging the contact time between actives and the epidermis and creating sufficient conditions for transdermal absorption.

Conventional penetration enhancers such as alcohols and certain surfactants often cause skin irritation, and long-term use may impair barrier function. By contrast, phospholipids carry outstanding biocompatibility. While facilitating transdermal delivery, they supplement lipids required by the skin, assist in repairing the stratum corneum, and avoid secondary damage to sensitive skin. This dual advantage of permeation promotion and barrier protection makes phospholipids widely applicable in repairing essences, anti-aging serums, brightening skincare and other product categories.

In formula development, phospholipids display excellent compatibility with vitamins, plant extracts, amino acid derivatives and various cosmetic active ingredients. Formulators can adjust the dosage and processing technology of phospholipids according to the molecular weight and solubility of target actives to optimize transdermal efficiency. Phospholipids can be directly added as permeation aids or prepared into liposome, microcapsule and other sustained-release delivery systems, realizing targeted transportation of active ingredients.

As consumers pursue efficient yet mild skincare products, simple surface moisturization can no longer meet market demands. Transdermal absorption technology has become a key direction for skincare innovation. Phospholipids overcome the defects of traditional irritating penetration promoters, and achieve efficient delivery of active ingredients relying on natural biomembrane affinity. It provides a mature and safe technical solution for developing high-performance skincare products, and expands the application prospect of natural phospholipids in the personal care industry.

Phospholipids rely on biomembrane homology and amphiphilic characteristics to exert prominent permeation-promoting effects. They assist functional components to penetrate the epidermal barrier via reversible lipid channel construction and active encapsulation. Compared with synthetic penetration enhancers, phospholipids balance transdermal efficiency and skin safety. This unique transdermal property enables phospholipids to act as core delivery materials for high-end skincare formulations, supporting the innovation of next-generation efficient mild skincare products.