This Swanson product is formulated with science and crafted with care. Our Citrus Bioflavonoid Complex features plant compounds sourced from bitter orange that work alongside vitamin C to aid absorption and enhance antioxidant support. Standardized to 50% bioflavonoids per serving, this formula helps support immune health and overall wellness. These citrus bioflavonoids complement regular vitamin C intake while providing quality antioxidant support. This gluten-free supplement fits easily into daily routines for those seeking additional immune support. We carefully select and source ingredients and work only with trusted partners. Backed by over 150 years of combined experience, our team of pharmacists, scientists, nutritionists, and quality experts ensures every product is tested for guaranteed purity, potency, and reliability.