By convention, specific symbols represent certain sample statistics. For example, 1  x refers to a sample mean. 2  s refers to the standard deviation of a sample. 3  s 2 refers to the variance of a sample. 4  p refers to the proportion of sample elements that have a particular attribute.
As the name implies, lubricant laxatives make stools slippery. The mineral oil within these products adds a slick layer to the intestine's walls and stops the stool from drying out. Though highly effective, lubricant laxatives are best used as a short-term cure for constipation. Over a longer period, mineral oil can absorb fat-soluble vitamins from the intestine, and decrease certain prescription drugs from being fully absorbed into the body.
If you opt for flaxseed as a constipation remedy, you should remember that flaxseed oil is different from the actual flaxseeds, which are available as whole or crushed seeds; flaxseed oil is not a constipation remedy. Stimulant herbs for constipation include senna, Cascara segrada, and aloe. One reason to think twice before using herbs for constipation is that the stimulant laxatives, particularly aloe, can cause cramping. Herbalists typically recommend a less powerful stimulant like senna before suggesting aloe.