Sunshine Nutrition ’s Cal-C1000 Sugar Free Effervescent tablets is formulated with Vitamin C 1000mg, Calcium, Vitamin D and Vitamin B6 to strengthen immune function and promote bone health. Vitamin C 1000 mg -Vitamin C plays a vital role in supporting the immune system. It helps stimulate the production and function of white blood cells, which are crucial for fighting off infections and illnesses Vitamin D -Vitamin D supports immune system function and helps regulate immune responses. Vitamin B6 -Vitamin B6 supports the production of antibodies and immune cells, helping maintain a healthy immune system. Calcium -Calcium is essential for maintaining strong bones and teeth and is involved in muscle contraction and relaxation