gentle on the tummy, allows you to take more without upset,convenient to use powdered crystals,easy to mix into drinks or sprinkle on food,useful for anyone taking larger intakesthis is a gentle, non-acidic form of vitamin c in powder form which is great for people who require large amounts of this vitamin or those who find tablets difficult to swallow. calcium ascorbate is an excellent source of vitamin c as the ascorbic acid (the official name for vitamin c) is readily released from the ascorbate compound after it has been absorbed by the body.the soluble crystals can be easily added to drinks or sprinkled on to foods, and each gram provides almost 900mg of vitamin c plus 100mg of calcium.we also sell calcium ascorbate in tablet form (see gentle vitamin c), which may be a more convenient way to take it during the day.vitamin c is well known for its role in the healthy functioning of the immune system, and it also contributes to the normal function of joints and blood vessels.