Solaray® Reacta-C delivers Vitamin C to the body all day and night for greater immune support. This 24-hour support formula complex includes Strontium Ascorbate and Calcium Ascorbate with L-Threonate for a non-acidic formula that is gentle on the stomach. Black elderberry extract provides greater immune support. Suggested Usage Use only as directed. Take 1 VegCap daily with a meal or glass of water. Ingredients Serving Size: 1 VegCapServings Per Container: 120Amount Per Serving / % Daily Value:Vitamin C 500 mg 556%-(from strontium ascorbate and calcium ascorbate as Reacta-C)Calcium 25 mg 2%-(from calcium ascorbate from Reacta-C)Black Elderberry (Sambucus nigra) (berry extract) 200 mg-(supplying 4mg [2%] polyphenols)Vitamin C Support Base 25 mg-Hesperidin Concentrate, Rutin Concentrate, Acerola Cherry, Indole-3-CarbinolOther Ingredients: vegetable cellulose capsule, calcium l-threonate, maltodextrin, magnesium stearate and silica.Vegan. Warnings Do not use if safety seal is broken or missing.Keep out of reach of children.Keep your licensed health care practitioner informed when using this product.