Intensive pro-aging serum with firming and wrinkle reducing action. Comprehensive improvement of all the signs of aging, such as sagging, expression lines, blemishes, and uneven texture of face, neck, and décolleté. Benefits Improves firmness and wrinkles. Stimulates collagen synthesis for smooth and elastic skin. Improves signs of aging. Renewing action, smoother and softer skin. Evens skin tone and enhances radiance. Improves the appearance of blemishes. Boosts and increases hydration. How to use Apply morning and night to clean and dry skin. Apply 3-4 drops and massage until completely absorbed. Use sunscreen daily. SUBJECTIVE EVALUATION* 91% notice their skin softer, smoother, and with fewer expression lines. 81% observe reduced wrinkle depth. 88% perceive an improvement in skin elasticity. 94% feel instant comfort. OBJECTIVE EVALUATION** Improves elasticity in 81% of volunteers. Increases skin elasticity up to 73%. Increases skin firmness up to 63%. Improves elasticity in 100% of volunteers! IN VITRO EVALUATION*** Increase of collagen up to 25%. Increase of elastin up to 42%. Increase of glycosaminoglycans up to 35%. *Subjective evaluation in 32 volunteers who used RETISIL Intensive pro-aging serum morning and night for 28 days. **Objective evaluation using Microcaya measurements in 26 volunteers who used RETISIL Intensive pro-aging serum morning and night for 28 days. ***In vitro analysis of the synthesis capacity of collagen, elastin and glycosaminoglycans in fibroblasts after 24 hours after the application of RETISIL Intensive pro-aging serum.