Firm and smooth skin in 10 days*! ALGENIST ELEVATE Advanced Retinol Serum is formulated with an exclusive pure vegan retinol encapsulated with green algae to preserve retinol\'s efficacy. A high concentration of the Alguronic Acid, naturally sourced and sustainably produced from algae, boosts retinol efficacy and helps support elastin in the skin**. Gentle enough to use every day and night, this high-performance formula helps enhance skin strength and elasticity, visibly improves skin texture and resistance to gravity, and minimises the appearance of fine line & wrinkles. * In a third party scientific test, Alguronic Acid displayed a powerful boosting effect on a number of well-known anti-aging ingredients. **In a third party scientific test, Alguronic Acid displayed a powerful boosting effect on a number of well-known anti-aging ingredients.