With soya peptide and white willow leaf extracts,
the new Sisley Sisleya L’Intégral Anti‑Âge Firming Concentrated Serum helps reduce the look of wrinkles
by reportedly boosting collagen production, and slowing collagen and elastin
degradation. Blue agave yeast extract also promotes the synthesis of hyaluronic acid, while iris extract works to soften and moisturise skin.