Taken just once a day, Ester-C® absorbs into your system & stays there to deliver 24-hour immune support & potent antioxidant activity. 24-hour support...12 months a year. Directions: As a food supplement for adults, one (1) capsule daily, preferably at mealtime, or as directed by a healthcare practitioner. Do not exceed directions for use. Food supplements should not be used instead of a varied balanced diet & a healthy lifestyly.