There are many causes of constipation, for example, medications; poor bowel habits; low fiber diets; possibly abuse of laxatives; hormonal disorders; diseases primarily of other parts of the body that also affect the colon; and high levels of estrogen and progesterone during pregnancy.
mg: Abbreviation for milligram, a unit of measurement of mass in the metric system equal to a thousandth of a gram. A gram is equal to the mass of one milliliter, one thousandth of a liter, of water at 4 degrees C. MG (in capital letters) is the abbreviation for the disease myasthenia gravis. Search MedTerms:
When dealing with liquids (water in our case), mg/L = ppm. mg/L stands for milligrams per Liter, ppm stands for parts per million Bear with me. By definition, a Liter of water weighs 1 kg (1 kilogram or 1000 grams). An 1 mg (1 milligram or 1/1000 of a gram) Therefore 1 mg = 1/1,000,000 of a kg.