Calcium Never Tasted So Good! Learn More about Kirkland Signarure Calcium 500 Click "View More Details" below. Kirkland Signature Calcium with Vitamin D3 Adult Gummies are the tasty way to get the Calcium and Vitamin D recommended to help your body stay strong. Packed with delicious orange and cherry flavors, these gummies support bone density and healthy teeth, muscle contraction, and nerve function and may also reduce the risk of Osteoporosis.* Just one serving (two delicious gummies) is all you need to receive 500 mg of Calcium and 1000 IU (20 µg) of Vitamin D3 per day.