Quercetin hydrate is widely used in the dietary supplement industry due to its antioxidant properties, which help combat oxidative stress and support overall health. It is commonly included in formulations aimed at boosting immune function and reducing inflammation. In skincare products, it is utilized for its ability to protect the skin from environmental damage and improve skin elasticity. Additionally, it is studied for its potential role in supporting cardiovascular health by promoting healthy blood pressure and cholesterol levels. Research also explores its use in managing allergic reactions and supporting metabolic health. Its natural origin makes it a popular ingredient in health-focused products.