epsomsalt

Epsom salt is magnesium sulfate heptahydrate, a mineral compound with the chemical formula MgSO4·7H2O. It crystallizes as white or colorless crystals that dissolve readily in water. The name derives from Epsom, a town in Surrey, England, where the salt was first identified in mineral springs during the 17th century.

Commonly sold as a bath additive, it is used to soak in warm water for temporary relief of muscle soreness and minor aches. External use is generally considered safe at typical household concentrations, though evidence for broader health benefits is limited. It is also employed in foot soaks and, in some cases, topical massage therapy.

Oral magnesium sulfate functions as an osmotic laxative and may be used to relieve constipation under medical or packaging directions. Incorrect dosing can cause diarrhea, dehydration, and electrolyte imbalance. It is not advised for people with kidney impairment or certain heart conditions without professional guidance.

In gardening and agriculture, Epsom salt is used as a magnesium and sulfur source for plants, particularly to address magnesium deficiency. It is not a substitute for balanced fertilization, and effectiveness depends on soil conditions and plant species.

Safety and storage: store in a cool, dry place and keep out of reach of children. Avoid inhaling dust, and follow label directions. Epsom salt has a broad range of uses, but improper ingestion or dosing can lead to adverse effects.