Yon-Ka Paris 1 oz. Cellular Code Serum This silky, elegant, powerhouse anti-aging serum is made of 97% natural origin and powered by Yon-Ka&sbquo; a proprietary cell-energy complex. The serum enhances cellular longevity, boosting cellular longevity proteins, and revitalizing cellular energy. Reinvigorating oxygenation, wrinkles appear smoother, skin feels firmer and the complexion supremely radiant. The proprietary cell energy complex, composed of a blend of powerful natural ingredients, work.