Q-Line Nutra’s Astaxanthin is a lipid-soluble carotenoid pigment produced by microalgae under stress conditions. It has strong antioxidant properties but is sensitive to heat, light, oxygen, and pH, which can reduce its stability. Its low water solubility also limits its bioavailability. To improve its practical applications in functional foods, pharmaceuticals, and cosmetics, astaxanthin is often encapsulated to enhance stability, solubility and absorption.