Radical Skincare Youth Infusion Serum rejuvenates, hydrates aging skin, reducing the appearance of fine lines and wrinkles, brightens the skin for a more youthful appearance. Algae extract helps boosts collagen production, firming and tightening skin while 5 % hyaluronic acid hydrates and soothes inflammation. Highlighting plant based stem cells, this powerful formula helps protects the skin cells and promotes cell turnover. Clinical studies show that after only 6 weeks of use, subjects experienced improved moisture retention, better skin tone and fewer wrinkle.