Quality Choice Epsom Salt - 1 lb (16 oz) (454 g) Quality Choice Epsom Salt (Magnesium Sulfate USP) is a soaking aid for minor sprains and bruises, as well as a saline laxative for the short term relief of constipation. Quality Choice Epsom Salt generally produces a bowel movement in 1/2 to 6 hours. relieves occasional constipation (irregularity) relieves pain from minor sprains and bruises Frequently Asked Questions Why should I purchase QC products? QC brand offers you comparable quality to advertised brands at a fraction of the price. If you are looking for quality and value, then you'll be a happy QC customer. The QC line meets virtually all your health/personal care and general merchandise needs. Are the QC products as good as the national brands? Both QC and advertised brands have to follow the stringent standards set by the Food and Drug Administration. That means they all follow the same rule book and are tested based on the same standards. Their active ingredients are the same and their dissolution rates are set to the FDA same standards. Because QC items go through rigorous product testing, you can be assured that they meet or exceed the quality of advertised brands. What criteria are used to compare QC products with national brands? Employing independent, unbiased testing labs, QC products are evaluated on many criteria including: active and inactive ingredient content; product size, shape, weight and appearance; count; dissolution rate; label warnings and usage instructions; packaging security and design.