Le Sérum – Excellence Code

Nectar d'Exception — Longevity Infusion. Decode the future of skin longevity. Le Sérum is Yon-Ka's most concentrated longevity formula to date, with visible results starting in just 7 days⁴.

Le Sérum delivers a 360° approach to skin longevity, uniting breakthrough science with the powerful connection between skin and emotions. It starts by targeting senescent "zombie" cells that continuously secrete toxic molecules and accelerate skin aging, then stimulates longevity genes through hormesis to boost the energy of tired healthy cells and accelerate skin renewal. It also helps protect the skin microbiome to prevent inflamm'aging and energy loss, keeping skin resilient against external aggressors. Because emotional well-being is directly linked to skin longevity, the serum also targets skin sensory receptors to help reboot the skin's youthful dynamic.

• Alpine Willowherb — ethically sourced from the Swiss Alps, helps reduce the accumulation of senescent ("zombie") cells that accelerate skin aging
• Peach Leaf Extract — helps stimulate SIRT-1, a key longevity protein supporting skin regeneration over time
• Pre-Postbiotic Complex — helps maintain a balanced skin microbiome by supporting hBD3, a key marker of skin's natural defenses

What you see: 80% firmer skin³ · -20% wrinkles² · +67% more even skin tone² · -25% visible pores · skin appears up to 6 years younger in just 2 weeks.

What you feel: 85% felt more confident about preserving their skin's youth · 100% felt the serum elevated their daily beauty ritual · 90% felt it contributed to their daily well-being.

99.5% natural origin (in accordance with the ISO 16128 standard). Light, nectar-like texture. Patented airless pump packaging.

30 ml

² % satisfaction – self assessment under dermatological control – day 28 – 20 women – aged 45–70 – all skin types, including 50% sensitive skin. ³ % satisfaction – In use test under dermatological control – day 28 – 20 women – aged 45–70 – all skin types, including 50% sensitive skin. ⁴ % satisfaction on day 7 – In use test under dermatological control – day 56 – 20 women – aged 45–70 – all skin types, including 50% sensitive skin. Clinical evaluation of skin flora and microbiota balance conducted on 21 volunteers after 28 days of use.