Product Description: Established in 1947, the only vitamin C that provides 24-hour immune-boosting benefits Non-GMO Gluten, Wheat, and Dairy-Free Supplement Ester-C®: The only vitamin C that provides 24-hour benefits. There is no other vitamin C like Ester-C®. Solgar® Ester-C® Plus 1,000 mg Vitamin C supplement provides a unique non-acidic vitamin C that is gentle on the stomach. Plus, it provides powerful immune-boosting benefits with 1,000 mg of Ester-C® per serving. Ester-C® Plus 1,000 mg Vitamin C also promotes upper respiratory health. Clinical studies have shown that Ester-C® remains in white blood cells for up to 24 hours. Solgar® Ester-C® Plus 1,000 mg Vitamin C provides 24-hour immune-boosting benefits and more. Directions for Use: As a dietary supplement for adults, take one capsule daily, preferably with a meal, or as directed by a healthcare practitioner.