Used as a laxative to relieve constipation by drawing water into the intestines and stimulating bowel movements. Commonly applied in cases of acute constipation or to prepare the bowel before medical procedures. Administered intravenously in medical settings to treat magnesium deficiency, prevent seizures in pregnant women with preeclampsia or eclampsia, and manage certain heart arrhythmias. Applied in agriculture as a foliar spray or soil additive to correct magnesium deficiency in plants, supporting chlorophyll production and overall growth. Used in first aid and home care for soaking sprains, bruises, or minor skin irritations, as it may help reduce swelling and ease discomfort. Employed in brewing and fermentation processes to supply magnesium, an essential nutrient for yeast activity. Commonly found in bath salts to soothe sore muscles and promote relaxation, though evidence for transdermal absorption is limited.