From the Manufacturer's Label:
Ferrochel® Chelated Iron Bisglycinate
We utilize the superior Albion Labs patented Ferrochel® Iron Chelate, which research has demonstrated to be highly absorbed, well tolerated and non-constipating at recommended levels.
Manufactured by NOW® Foods.Contains no: sugar, salt, yeast, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives. Vegetarian/Vegan Product.