Yon-Ka Paris Bi-Serum Retinol-Like 30ml

Yon-Ka Paris Bi-Serum Retinol-Like 30ml

An advanced dual-phase serum that targets 100% of wrinkle types, tightens pores from the very first use and leaves skin texture 2x finer, without irritation and without retinol. Suitable for all skin types, including sensitive skin.

Two retinol-like active ingredients of 100% natural origin work synergistically within Yon-Ka's exclusive [RE]NEW technology to reactivate skin renewal at both the dermal and epidermal level. The result is visibly smoother, tighter-looking skin with a noticeably finer texture, delivered through a formula that is 99.8% natural origin and absorbs quickly without discomfort.

What the clinical data shows:

• 9 out of 10 people experienced refined pores
• 8 out of 10 people had younger-looking skin and visibly filled deep wrinkles
• 92% of people reported softer, smoother skin
• 100% of wrinkle types addressed including smile lines, forehead lines and crow's feet
• Skin texture 2x finer after consistent use
• 100% comfort satisfaction from the first application

Tested under dermatological control. Twice-daily application on 24 women aged 46 to 70, all skin types including sensitive skin. Wrinkles: significant self-assessment results on 100% of wrinkle types evaluated at Day 56. Skin texture: self-scoring under dermatological control, % variation at Day 56 versus Day 0. Pores: self-assessment result, 63% satisfaction, immediate result. Comfort: 100% satisfaction, immediate result.

Apply twice daily, morning and evening, to cleansed skin.

Shake well before use to combine the dual-phase formula. Apply a few drops to the face and neck and massage gently until fully absorbed. Follow with your moisturiser.

For best results, use consistently for a minimum of 8 weeks.

Encapsulated Biomimetic Microalgae (Retinol-Like Active 1, from Biotechnology): A biotechnology-derived microalgae that delivers a structural analogue of retinoic acid to the skin. It stimulates cellular activity and targets fibroblasts to support collagen pathways, reactivating skin renewal at the dermal level. Clinically shown to outperform retinol in the retinoid pathway without the associated irritation.

Mastic Tree Active Fraction (Retinol-Like Active 2, Plant-Derived): An active fraction derived from the mastic tree that works synergistically with the microalgae active to protect and enhance retinoid mechanisms. It inhibits the degradation of retinoic acid and increases gene expression involved in the retinoid cascade, amplifying the overall skin renewal response at the epidermal level.

[RE]NEW Technology: Yon-Ka's proprietary delivery system that allows both retinol-like actives to work in combination across the dermal and epidermal layers, targeting key mechanisms of the retinoid pathway to reactivate skin renewal and visibly improve skin microrelief.

Formulated with 99.8% ingredients of natural origin. Full ingredient list available on request or on product packaging.

About Yon-Ka Paris: Founded in Paris in 1954, Yon-Ka is a French professional skincare brand with over 70 years of expertise in phyto-aromatic skincare. The brand is built on a deep respect for plant science and a commitment to formulating with high concentrations of botanical actives, essential oils and biotechnology-derived ingredients that deliver genuine results.

Yon-Ka's formulations are developed in collaboration with dermatologists and research scientists, combining traditional plant knowledge with modern biotechnology to create products that are both effective and sensorial. The brand's signature Quintessence complex, a blend of five essential oils including lavender, geranium, rosemary, cypress and thyme, runs through much of the range and is central to the brand's phyto-aromatic philosophy.

The Bi-Serum Retinol-Like represents Yon-Ka's investment in next-generation active technology, bringing clinically validated retinoid-pathway performance to a formula that is 99.8% natural origin and suitable for sensitive skin. It reflects the brand's ongoing commitment to efficacy without compromise.

Yon-Ka works exclusively through professional skincare clinics and authorised stockists, ensuring that every customer benefits from expert guidance alongside their products.

South William Clinic is a trusted authorised partner of Yon-Ka Paris, bringing you authentic products with the support of our experienced clinical team. We can help you integrate the Bi-Serum Retinol-Like into a personalised routine designed around your skin type and anti-ageing goals.

Clinical Study Data

Tested under dermatological control. Twice-daily application on 24 women aged 46 to 70, covering all skin types including sensitive skin.

Results at Day 56:
- 100% of wrinkle types addressed, including smile lines, forehead lines and crow's feet
- Skin texture 2x finer versus Day 0 (self-scoring under dermatological control)
- 9 out of 10 participants experienced refined pores (63% satisfaction, immediate result)
- 8 out of 10 participants reported younger-looking skin and visibly filled deep wrinkles
- 92% of participants reported softer and smoother skin
- 100% comfort satisfaction from the first application

Both retinol-like actives within the [RE]NEW technology are clinically proven to outperform retinol within the retinoid pathway, without causing irritation.

Q: What makes this a retinol alternative rather than a retinol serum?
A: This serum contains two retinol-like active ingredients of 100% natural origin that work within the retinoid pathway without using retinol itself. The encapsulated biomimetic microalgae delivers a structural analogue of retinoic acid and has been shown to outperform retinol in clinical testing, while the mastic tree active fraction protects and amplifies the retinoid cascade. The result is comparable efficacy without the irritation, dryness or sensitivity that retinol can cause.

Q: Is this suitable for sensitive skin?
A: Yes. The clinical study was conducted across all skin types including sensitive skin, and 100% of participants reported comfort satisfaction from the first application. The formula is designed to deliver retinol-level results without the associated irritation.

Q: What wrinkle types does this address?
A: The formula has been clinically shown to address 100% of wrinkle types evaluated in the study, including smile lines, forehead lines and crow's feet.

Q: How quickly will I see results?
A: Pore refinement and comfort were noted as immediate results. Visible improvements to wrinkles and skin texture were measured at Day 56 following twice-daily application.

Q: What is [RE]NEW technology?
A: [RE]NEW is Yon-Ka's proprietary delivery system that allows the two retinol-like actives to work in combination across both the dermal and epidermal layers. By targeting key mechanisms of the retinoid pathway at multiple levels simultaneously, it reactivates skin renewal more comprehensively than a single-active approach.

Q: How natural is the formula?
A: The formula is 99.8% ingredients of natural origin. Both active ingredients are derived from natural sources, with the microalgae produced through biotechnology and the mastic tree active being plant-derived.

Q: Can I use this serum in the morning as well as the evening?
A: Yes. It is designed for twice-daily application, morning and evening. Follow with SPF in the morning to protect skin that is actively renewing.

Q: How does this compare to a standard retinol serum?
A: The encapsulated biomimetic microalgae in this formula has been clinically shown to outperform retinol within the retinoid pathway. Unlike retinol, it does not carry the risk of photosensitivity, irritation or peeling, making it suitable for year-round twice-daily use across all skin types.

Q: Do you ship internationally from Ireland and what about customs?
A: Yes, we ship worldwide from our Irish facility. We regularly serve customers in the UK, United States, Germany, Italy, Spain, Cyprus, Australia, France, Netherlands, Canada, and many other countries throughout Europe, Asia, and the Middle East. Please note that customers are responsible for any local customs charges which are outside of our control.