Nutralife Ester C + 500Mg Chewbles Tablets 120 taken when required, Nutra-Life Ester-CÂ¬Ã† + 500: - Provides 24 hour immune support and may aid in decreasing the duration of colds when taken regularly and is a is a potent antioxidant. Ester-CÂ¬Ã† is a researched form of Vitamin C that supports natural immunity. Ester-CÂ¬Ã† may lead to a more sustained retention of Vitamin C in the white blood cells than ascorbic acid*. It is a non-acidic form of Vitamin C and may be better tolerated than standard Vitamin C in people who are sensitive to acidic foods. *in non-smokers.