• Formulated with Ester-C®, Echinacea and Zinc• With Echinacea, traditionally used in Western herbal medicine to reduce symptoms of common colds and flu, and mild upper respiratory tract infections GO ESTER-C® COLD & FLU is a quality formula with Ester-C®, which is a high quality, scientifically researched form of Vitamin C, and Zinc to support healthy immune system function. It also contains Echinacea, traditionally used in Western herbal medicine to reduce symptoms of common colds and flu, as well as mild upper respiratory tract infections. Ester-C® is a non-acidic form of Vitamin C to maintain immune system health.The benefits of Ester-C ®A high quality, scientifically researched form of Vitamin C24-hour immune system function support*Non-acidic Vitamin C, Gentle on the stomachSuperior absorption compared to ascorbic acid* Only applies when the formula contains 1,000 mg of Ester-C® Size: 30 Pack