Taking vitamin D3 can cause calcium build up in areas of the body that it is not wanted which can affect health. You will always see K2 with D3 in our products. Vitamin A, Vitamin D, Vitamin E, Vitamin K2, Vitamin C, Vitamin B1, Vitamin B2, Niacin, Vitamin B6, Vitamin B12, Folic Acid, Biotin, Pantothenic Acid, Calcium, Magnesium, Iron, Zinc, Manganese, Selenium, Chromium, Molybdenum and Iodine.