Nature's Sunshine Citrus Bioflavonoids with Vitamin C combines high-strength vitamin C with grapefruit bioflavonoids, hesperidin and lemon bioflavonoids. Vitamin C is important for immune support, antioxidant protection, collagen formation and iron absorption. Citrus bioflavonoids are commonly paired with vitamin C because they help support capillary strength and antioxidant activity.
This pairing matters because vitamin C and bioflavonoids naturally occur together in citrus fruits. They are often discussed together in research and supplement use for immune support and connective tissue health. If you want more than plain vitamin C, this blend gives you the added citrus compounds that usually come with it in food.