One of the most important vitamins for your immune system is Vitamin C. This water-soluble vitamin can be responsible for strengthening your immune system as well as your collagen production. You may need a little more Vitamin C than usual during cold and flu season. In countless medical research studies , Vitamin C has proven to be instrumental in preventing cardiovascular problems, a weakened immune system, and various mood disorders. Vitamin C can play a vitally important role in maintaining your health at all levels. Each capsule provides 1000 mg of Vitamin C which is derived from tapioca. Tapioca-sourced Vitamin C is far more purified than the reagent-grade version. Unlike other Vitamin C supplements, this one is dairy, nut, sugar, corn, binder, and preservative free. Vitamin C-100 from Tapioca may be ideal if you have food sensitivities.