Retinol Serum utilizes encapsulated, time-release Retinol, stabilized within a protective delivery system to enhance penetration and minimize irritation. This advanced form steadily releases into the skin for up to 72 hours, offering powerful rejuvenating results with a far gentler profile than free retinol. To complement this, the formula also includes Bakuchiol—a plant-derived retinol alternative that delivers more immediate, non-irritating surface brightening and refinement, ensuring both instant radiance and long-term transformation.

Yes. Definitive Retinol Serum is formulated to deliver powerful results with exceptional tolerance. The encapsulated Retinol releases slowly, minimizing the irritation often caused by traditional forms. Bakuchiol provides an immediate, non-irritating brightening and refining effect, so skin benefits from both instant and long-term renewal. Barrier-strengthening ceramides, hydrating hyaluronic acid, and soothing Squalane further cushion the more active ingredients - helping sensitive or reactive complexions adapt more comfortably to retinol. As with all retinoids, we recommend a gradual introduction (2–3 nights per week) and adjusting frequency according to skin’s needs.

Prescription tretinoin is unencapsulated and highly potent, which often causes dryness, redness, and peeling. Definitive Retinol Serum delivers comparable rejuvenating results through encapsulation and synergistic actives - making it far more comprehensive and skin-compatible, without the harsh side effects.

• Short-term (2–4 weeks): Skin appears smoother, brighter, more even.
• Mid-term (6–8 weeks): Lines, pores, and texture are visibly refined.
• Long-term (12+ weeks): Collagen renewal improves firmness, elasticity, and reduces visible aging.

• Start with 2–3 evenings per week.
• Increase frequency as your skin builds tolerance, up to nightly if well-tolerated.
• Always pair with a nourishing cream, and use broad-spectrum SPF during the day, as retinol heightens sun sensitivity.

It can be misleading to compare retinol products solely by percentage. Many formulas list a raw percentage of unencapsulated retinol, which often irritates the skin and degrades quickly on the surface.
Definitive Retinol Serum uses encapsulated, time-release retinol, which penetrates deeper and remains active longer. This means that even at a lower listed percentage, it can deliver equal - or superior -results compared to products with higher free retinol levels, while being far more tolerable.
At AUTEUR, the focus is not on the number, but on delivery technology, stability, and synergistic actives - ensuring visible results that outlast the application.