Lamberts® Time Release Vitamin C 1000mg tablets also provide a relevant level of citrus bioflavonoids since studies show that vitamin C and bioflavonoids are most effective when taken together. A gradual release of vitamin C which replicates the natural process of food digestion. A more stable level of vitamin C in the blood for a longer period. A lower rate of excretion of vitamin C. The beneficial effects of vitamin C available over a sustained period.