Epsoak Epsom Salt (Magnesium Sulfate) is USP grade. It is GMO free (Genetically Modified Organism). After soaking in Epsoak Epsom Salt it becomes clear why Epsoak is the leading name in Epsom Salt. The expertly selected grain size of Epsoak Epsom Salt means that it dissolves quickly & easily in warm water without hassle every single time. It's transparent/slightly white in color, and is unscented. Buy in BULK and save. Known for its amazing therapeutic qualities, an epsom salt bath can help to relieve muscle aches and pains, relieve aching feet, cleanse pores, flush out toxins, detoxify the skin. Mix with shower gel to create your own body scrub. Epsom Salt can do amazing things to help your Garden flourish. Epsom Salt for plants is a completely natural and cost efficient way to give them that extra boost to help your plants thrive. Use on plants, lawn, shrubs and more??? Here at the San Francisco Salt Company we are confident that you will be completely satisfied with our products, which is why we stand behind every single item that we sell. If you are not completely satisfied with your purchase reach out to us directly and we will make it right.