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.