Gluten free. Magnesium sulfate USP MgSO4. 7H2O. Saline laxative/soaking aid. Saline laxative for relief of occasional constipation. Soaking aid for minor sprains and bruises. For external use as a soaking aid for minor sprains and bruises. 100% quality guaranteed. Like it or let us make it right. That's our quality promise. Resealable pouch. Other information: Each teaspoon (5 grams) contains: magnesium 495 mg.