Lira Clinical Pro C4 Retinol Serum - 1.69 oz Anti-Aging Vitamin C + Retinol for Brightening & Texture

Designed by skincare educators and formulated with four forms of vitamin C plus retinol and multiple plant stem cells, this serum targets uneven tone, fine lines, and texture while supporting a balanced complexion. The lightweight, fast-absorbing formula combines botanical extracts like licorice and olive leaf with Swiss apple, alpine rose, and sea fennel stem cells to deliver antioxidant protection and visible smoothing without heavy residue.

How does this serum improve dull or uneven skin tone?

The Pro C4 serum blends four stable vitamin C derivatives to address discoloration and enhance radiance gradually and consistently. Those antioxidant forms work alongside licorice extract to help even skin tone while gentle resurfacing from retinol promotes cell turnover for a brighter surface.

• Four complementary vitamin C forms deliver multi-pathway brightening.
• Licorice extract helps reduce the look of dark spots and discoloration.
• Retinol encourages skin renewal for improved clarity and glow.
• Lightweight texture layers easily under moisturizers and SPF.

Will this serum help with fine lines and texture?

Yes — the formulation marries retinol’s resurfacing properties with peptides and plant stem cells that support firmness and elasticity. Regular use can reduce the look of fine lines and smooth skin texture by accelerating skin turnover and supporting a healthier surface feel.

• Retinol targets texture irregularities and stimulates cell renewal.
• Plant stem cells from Swiss apple and alpine rose assist in preserving a firmer appearance.
• Antioxidants protect against environmental stressors that can accelerate visible aging.
• Non-greasy finish suitable for layering in nightly routines.

Is this serum appropriate for acne-prone or sensitive skin?

The formula was created with balancing ingredients to support blemish-prone complexions while minimizing irritation. Olive leaf and licorice extracts calm and soothe, and the serum is described as non-irritating when introduced gradually; patch testing and stepwise integration are recommended for sensitive skin.

• Retinol helps manage breakouts and refines pores when used as directed.
• Olive leaf and botanical extracts soothe inflammation and support barrier function.
• Suitable for acne-prone skin when introduced slowly and paired with hydration.
• Apply alternate nights initially, then increase frequency as tolerated.

How should I add this serum into my skincare routine?

Use Pro C4 as a nighttime treatment after cleansing and before moisturizer. Begin with a small amount a few nights per week, increase gradually, and always follow with daytime SPF when using retinol products to protect renewed skin.

• Apply a pea-sized amount to cleansed skin in the evening.
• Start 2–3 nights weekly, then build to nightly use as tolerated.
• Pair with a gentle moisturizer; avoid strong actives on the same night initially.
• Use broad-spectrum sunscreen each morning while using retinol.

Who is this for: Lira Clinical Pro C4 Retinol Serum is formulated for people seeking a multitasking serum that brightens, refines texture, and supports clearer-looking skin. It suits mature or acne-prone complexions and anyone ready to introduce a targeted vitamin C + retinol treatment into their evening routine. Those with very sensitive skin should patch-test and introduce the product slowly.