Used in agriculture as a fertilizer to correct magnesium deficiency in soil, promoting healthy plant growth and chlorophyll production. Commonly applied in gardening and farming for crops like tomatoes, potatoes, and roses. In medicine, it serves as a treatment for magnesium deficiency, seizures in pregnant women with preeclampsia, and as a laxative to relieve constipation. Also used in emergency care to manage certain heart arrhythmias. In healthcare and wellness, it is found in bath salts (often called Epsom salt) to soothe sore muscles, reduce inflammation, and promote relaxation, though evidence for skin absorption is limited. Industrially, it is used in brewing, textile processing, and as a drying agent due to its hygroscopic properties. Also employed in wastewater treatment and in the preparation of fireproofing materials.