T'ang Vitamin C Calcium Ascorbate. Non-acidic Crystalline powder. One quarter teaspoon is approximately equivalent to 1000mg of Vitamin C. Dissolve in a glass of fruit juice and drink. This is not flavoured, so needs to be added to something tasty or in a small shot, with water and a drink consumed afterwards. Certified GE GMO free. Store below 30C and away from direct sunlight. One quarter teaspoon is approximately equivalent to 1000mg Vitamin C.