Natures Way - Calcium & Magnesium Citrate 2:1 - 500 Millilitre(s) - NPN: 80049252 -- Nature's Way Calcium & Magnesium is formulated in a 2:1 Calcium to Magnesium ratio in a great tasting blueberry formula. It also contains bone-friendly ingredients Collagen, Manganese, Boron, Vitamin K2 and Vitamin D3. This liquid form is a convenient alternative to tablets or capsules to help support the maintenance of bones and teeth.