Because vitamin C is water-soluble, it passes quickly through the body. Health First Vitamin C is a timed-release formula, allowing it to be released slowly over a 6-to-8-hour period, making the benefits of vitamin C available over a longer period of time than regular vitamin C supplements. This Health First formula combines vitamin C with citrus bioflavonoids and rosehips to increase absorption and ensure you’re getting the most out of your vitamin C!