Support your immune system with the Thorne Immune Support Combo featuring Vitamin D3 and Vitamin C. Thorne Vitamin D3 supports healthy immune function, bones, and muscles, while Thorne Vitamin C with citrus bioflavonoids provides antioxidant support and promotes collagen production for healthy tissue. Trust Thorne for premium-quality supplements backed by science and trusted by healthcare professionals worldwide. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.