What it does
A glycoprotein-mimetic active developed by L'Oreal. Supports the skin's extracellular matrix to address visible signs of aging like wrinkles and laxity.
Best for
Mature skin with deep wrinkles and visible laxity. The hero active in SkinCeuticals A.G.E. Interrupter Advanced.
The full picture
Proxylane is the trade name for hydroxypropyl tetrahydropyrantriol, a synthesized glycoprotein-mimetic developed by L'Oreal research (SkinCeuticals' parent company). It is designed to support the proteins that hold the skin's extracellular matrix together, which decline with age and contribute to visible sagging. SkinCeuticals features Proxylane at 18% in A.G.E. Interrupter Advanced, making it one of the highest concentrations of the active in any commercial product. Independent peer-reviewed studies are scarcer than the in-house L'Oreal data, but the mechanism is consistent with the broader extracellular-matrix-support category.
Evidence
Proxylane has been shown in laboratory studies to support extracellular matrix proteins relevant to skin firmness. L'Oreal-sponsored research underpins most published data.
Read the source: INCIDecoder: Hydroxypropyl Tetrahydropyrantriol (Pro-Xylane) ->Reviewed August 2, 2026: Reviewed August 2026. Pro-Xylane (hydroxypropyl tetrahydropyrantriol) is an L'Oreal-developed ingredient with some supportive research, still mostly supplier and brand-led.
