Chrysophyceae is one of the microalgae with great development potential in the fields of nutrition, health care, and cosmetics. Its core value lies in its rich content of various highly bioactive components, particularly the unique β-1,3-glucan (chrysolaminarin), plant-based Omega-3 fatty acids (DHA/EPA), and carotenoids. In the health care field, β-1,3-glucan derived from Chrysophyceae exhibits excellent water solubility and high bioactivity, enabling it to efficiently regulate immunity, exert antioxidant effects, and improve intestinal health. Meanwhile, its plant-based DHA provides a pure and sustainable solution for brain and cardiovascular health. In the cosmetics field, β-1,3-glucan has become a popular ingredient in high-end skincare products due to its outstanding moisturizing, repairing, and anti-wrinkle properties. It is widely used in serums, creams, and facial masks, aiming to enhance skin barrier function and delay skin aging.