Many people suffer from constipation, either occasionally or chronically. The National Health Interview Survey conducted by the Centers for Disease Control and Prevention estimates constipation affects up to 2 percent of the U.S. population at any time. However, Epsom salts work effectively as a laxative and can relieve constipation within a few hours.
Function
Epsom salts are made of magnesium sulfate, a type of salt. When a constipation sufferer takes Epsom salts, the salts work to draw water into the colon from the blood, potentially making the stool easier to pass. In addition, the magnesium in Epsom salts can help muscles contract, which may produce a laxative effect, assisting the bowel walls in contracting to expel the stool.
Types
Epsom salts are widely available over-the-counter in most drug stores, both as generic salts and brand-name laxatives. Milk of magnesia has Epsom salts and can be purchased in tablet or liquid form. In addition, consumers looking for a laxative also can find inexpensive bulk Epsom salts in the drugstore.
Features
When using milk of magnesia or another type of laxative medication, follow the package directions and do not overdose. Bulk packages of Epsom salts found in drug stores usually include directions for using the salts as a laxative, as well. But if the package purchased doesn't include instructions, mix 2 to 4 teaspoons of the Epsom salts into a glass of water and drink. Both laxative remedies should take effect within six hours.
Warning
Mayo Clinic gastroenterologists warn that people who suffer chronic constipation can overuse laxatives, including Epsom salts. In this case, they run the risk of becoming dependent on them to produce bowel movements. In addition, Epsom salts -- either in generic salt form or in the form of a laxative medication -- can cause side effects that include bloating, gas and diarrhea, according to Mayo Clinic physicians.
Theories/Speculation
Despite the risk of side effects, Epsom salts work effectively as a laxative and are available widely and inexpensively over-the-counter. Epsom salts also can be absorbed through the skin from bath water, and some natural health experts suggest using regular Epsom salt baths to prevent constipation. In this case, they recommend mixing 1 cup or more of bulk Epsom salts into the warm bath water and soaking for 10 to 30 minutes.
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