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Ingredient guide
hydroxypropyl tetrahydropyrantriol
In short
Hydroxypropyl tetrahydropyrantriol (Pro‑Xylane) is a patented L’Oréal ingredient that supports skin density, hydration, and the feel of firmness. It encourages the production of skin‑supporting sugars and structural proteins. Clinical data from the developer shows visible improvements in skin smoothness and plumpness.
Reviewed against published evidence · editorially independent · no brand pays for placement
Works for
Firmness · Barrier · Hydration
Best used
Anytime
What it is
Xylose-derived C-glycoside developed by L'Oréal Research; acts as a glycosaminoglycan (GAG) booster by stimulating the synthesis of type VII collagen and proteoglycans in the dermo-epidermal junction, particularly fibronectin and chondroitin sulphate; strengthens the structural anchorage between the dermis and epidermis; clinical results published by L'Oréal show statistically significant improvements in skin density and firmness versus placebo in a 4-month double-blind study; water-soluble and formulated at 0.1–1% in most commercially available products.
Also found as
Related
Where to find it
L'Oréal Paris Revitalift Laser X3 Serum
La Roche-Posay Substiane Serum
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Common questions
It helps reinforce the skin’s support structure for a smoother, more resilient look and improves hydration.
It suits anyone noticing reduced firmness or dryness and is generally well tolerated across skin types.
It is typically found in serums and creams from L’Oréal group brands and can be used in a daily routine with other hydrators.
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Personal guidance only · For clinical concerns, see a dermatologist.