It provides highly bioavailable magnesium in the citrate form (a study comparing similar supplements from other companies showed that the absorption of Lamberts Mag Asorb was superior to those from other companies). The powder dosage form was chosen for people who require large amounts of magnesium and for those who cannot swallow large tablets. 5.5 grams of powder provides 100% of the Recommended Daily Intake of Magnesium (includes measuring spoon). Suitable for vegetarians. White soluble powder. Excipients : Citric acid, Dextrin, Acidity regulator: Sodium bicarbonate, Flavoring, Anti-caking agents: Tricalcium phosphate & Silicon dioxide, Sweetener: Sucralose, Color: Lutein Suitable for vegetarians. Allergies: None. Precautions : Magnesium intake exceeding 400mg may cause mild gastrointestinal upset in sensitive individuals.