Blackmores Buffered C Slow Release has been specially formulated to provide a prolonged rate of absorption by releasing nutrients slowly over a sustained 8 hour period, ensuring that vitamin C is available when your body needs it. This low acid formulation is buffered with mineral ascorbates, so it is gentle on the stomach. It also contains bioflavonoids, including rutin and hesperidin, to help enhance the action of vitamin C in the body.