Valupak Vitamin C 1000 mg Effervescent tablets have a rich, delicious orange flavor and is an excellent way to supplement the daily intake of Vitamin C. The body does not store this vitamin so a regular daily intake is required. Vitamin C contributes to the protection of cells from oxidative stress. It also plays a role in normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, skin and teeth.