Magnesium Sulfate Heptahydrate (jise Epsom salt kehte hain) ek mineral salt hai jo skincare mein water-in-oil emulsions ko stable rakhne aur formulations ki consistency adjust karne ke liye use hota hai. Yeh ek mild exfoliant ke taur par kaam karta hai aur bath soaks mein apne osmotic properties ke liye use hota hai.