Pro-Xylane (INCI name: Hydroxypropyl Tetrahydropyrantriol, CAS 439685-79-7) is a sugar-derived, biomimetic ingredient developed by L’Oréal R&D. It is synthesized from xylose, a sugar found naturally in beech and other trees, and is widely used in cosmetics for anti-aging and hydration benefits.
Key Functions & Mechanisms
Anti-Aging & Structural Support
- Stimulates production of glycosaminoglycans (GAGs) — molecules like hyaluronic acid that help maintain moisture and skin structure.
- Promotes synthesis of collagen and elastin and reinforces structural proteins such as fibrillin and laminin, strengthening the dermal-epidermal junction.
- Helps reduce the appearance of fine lines and wrinkles by supporting skin firmness and elasticity.
Deep Hydration & Barrier Support
- Excellent moisture retention — enhances skin’s ability to hold water, improving smoothness and plumpness.
- Reinforces the skin barrier, reducing transepidermal water loss (TEWL) and defending against environmental stressors.
Skin Texture & Tone
- Improves overall skin texture, radiance, and uniformity.
Typical Uses in Skincare
Pro-Xylane is incorporated into a variety of products including:
- Serums
- Creams and moisturizers
- Eye creams
- Anti-wrinkle treatments
- Masks and essences
It can be used in concentrations typically ranging from about 0.2 % up to 3 %+ depending on formulation and product type.
Who It’s For
Pro-Xylane is suitable for:
- Ageing or mature skin
- Dry or dehydrated skin
- Anyone looking to improve skin elasticity, hydration, and firmness
It tends to be well-tolerated, often milder than stronger actives like retinoids, making it compatible even with sensitive skin when well-formulated.
Precautions
- Though generally gentle, as with any active ingredient, patch testing first is recommended to check for sensitivity or irritation.
- Use consistent skincare practices (e.g., sunscreen daily) to support results.
Bottom Line
Pro-Xylane is a scientifically supported hydrating, anti-aging skincare ingredient that helps improve moisture levels, skin firmness, and overall texture by enhancing key structural components of the skin.
If you want, I can break down how it compares to other anti-aging ingredients like retinol or hyaluronic acid!