β-D-Glucan from barley is widely used in the food and beverage industry as a dietary fiber additive to enhance the nutritional profile of products. It is incorporated into baked goods, cereals, and beverages to improve texture, moisture retention, and shelf life. In the health and wellness sector, it is utilized as a functional ingredient in supplements due to its ability to support immune function and promote cardiovascular health by reducing cholesterol levels. Additionally, it is employed in skincare products for its moisturizing and soothing properties, helping to improve skin barrier function and reduce irritation. Its biocompatibility and bioactive properties also make it a candidate for research in biomedical applications, such as wound healing and drug delivery systems.