Details Dietary Supplement. TwinLab Ester-C 1000 with Citrus Bioflavonoid Complex is a unique ascorbate complex bound to calcium from calcium carbonate. This special form of Vitamin C is pH neutral (non-acidic) and contains naturally occurring metabolites. It is naturally processed in purified water without the use of alcohol or acetone solvents. This product also contains a citrus bioflavonoid complex. Each Ester-C 1000 with Citrus Bioflavonoid Complex Tablet contains the highest quality ingredients. 100% Vegetarian Tablets. Ester-C 1000 with Citric Bioflavonoid Complex is free of sugars, salt (sodium), wheat, yeast, dairy, artificial colors, flavors and preservatives.Directions As a dietary supplement, take one or more tablet daily.PLEASE NOTE: The information above is intended for reference only. While we attempt to keep our information accurate, we cannot guarantee it is an accurate representation of the latest formulation of the product. If you have any concerns, please visit the vendor??s website.*Prices are subject to change at any time and some items are limited to stock on hand. Product SKU: 191368