Each Capsule provides 400 mg of Magnesium from magnesium oxide & magnesium aspartate providing 100% of the US Recommended Daily Allowance. Twinlab Magnesium Caps are easier to swallow and assimilate. Well tolerated by most highly allergic individuals. No tablet binders, coatings or colorings. Free of the most common allergens such as corn, soy, yeast, rice, barley, wheat, lactose (milk sugar) and all milk, citrus, fish and egg products. No added flavorings, sugars, salt, artificial sweeteners, colorings, preservatives or salicylates. Packaged in a glass bottle for maximum stability, quality and freshness. This product is manufactured at our own state of the art facility.