Astragalus polysaccharide is widely used in immune modulation due to its ability to enhance the body's natural defense mechanisms. It stimulates the activity of macrophages and increases the production of cytokines, which helps in fighting infections and supporting overall immune function. In traditional and complementary medicine, it is commonly used to support recovery in patients with weakened immune systems, including those undergoing chemotherapy or suffering from chronic fatigue.

It has also shown potential in anti-aging and anti-diabetic applications. Studies suggest it can improve insulin sensitivity and reduce oxidative stress, making it beneficial in managing type 2 diabetes. Additionally, its antioxidant properties help protect cells from damage, supporting cardiovascular and liver health.

In veterinary and animal feed industries, it is added as a natural immunostimulant to improve disease resistance in livestock and poultry, reducing reliance on antibiotics. Its low toxicity and natural origin make it a favorable choice in health supplements and functional foods.