Natures Bounty Immune 24 hour +, Vitamin C, with Vitamin D & Zinc

The only vitamin C with 24 hour immune support. Ester-C per serving. with elderberry, echinacea. Support upper respiratory health. The 24 Hour Difference: Every dose of Immune 24 Hour+ provides advanced, long-lasting immune support with 1,000 mg of Ester-C. Clinically studied to stay in your white blood cells for up to 24 hours, Ester-C is the only Vitamin C with 24 hour immune support. Percent change (%) of vitamin C in white blood cells over 24 hours. Plus +: Provides vitamin D, vitamin A, and zinc for extra immune plus antioxidant support. It also includes elderberry and echinacea. Supports Upper Respiratory Health: Highly bioavailable Ester-C can increase Vitamin C levels in the body, which is important for white blood cell function. White blood cells play a vital role in the immune system and contribute to the health of the upper respiratory tract. These rapid release softgels provide 9 essential nutrients to help keep you healthy. No starch. No yeast.