Vegetable cellulose. Cellulose is a natural compound found in the cell walls of many plants. Powdered cellulose is added to tablets and capsules for a variety of reasons: to dilute the ingredients in tablets or capsules or to help tablets disintegrate following ingestion. Powdered cellulose is not absorbed systemically following oral ingestion and thus has little potential for toxicity. While consumption of large amounts (i.e., 6 g) may have a laxative effect, this is not a concern for individuals consuming the small amounts used as formulation aids in dietary supplements 1.