Phosphatidylglycerol

Phosphatidylglycerol (PG) is a phospholipid—a fatty molecule with a phosphate group—found naturally in cell membranes throughout the body, including the skin. In cosmetic formulations, it serves as a structural component that mimics the skin's own lipid composition, helping to maintain the integrity of the stratum corneum (the outermost layer of skin).As a membrane-supporting ingredient, phosphatidylglycerol works at the cellular level to reinforce the barrier between skin cells and reduce transepidermal water loss. It may also have mild anti-inflammatory properties and support normal cell …

Phosphatidylglycerol integrates into the lipid bilayers of cell membranes, filling gaps and reinforcing structural integrity. By doing so, it helps prevent moisture evaporation and maintains the skin's protective barrier function.Research suggests that phosphatidylglycerol may also interact with cellular signalling pathways that regulate inflammation and cell proliferation, though the precise mechanisms in skin remain incompletely understood. Its anti-inflammatory potential appears to relate to its role in cell membrane stability rather than a direct pharmacological effect.

Phosphatidylglycerol is typically found in serums, moisturisers, and barrier-repair products. Since it works best as part of a balanced formulation with complementary lipids and humectants, use it consistently as directed. There is no evidence that higher concentrations offer proportionally greater benefit, so standard product usage is appropriate.

Phosphatidylglycerol is well-tolerated and unlikely to cause irritation in most individuals. Those with sensitivities to phospholipids or soy (a common source) should check the product's ingredient list and origin.