lin was filled with impurities that sometimes upset the systems of those who injected it. Today, insulin is available in two forms-a semisynthetic from made by converting pork insulin and recombinant insulin, a form that is also basically identical to human insulin made through genetic engineering (genetic engineering is the manipulation of genes from animals or plants in a laboratory.) A doctor decides which form of insulin is the best for the diabetic. Although there are two ways of manufacturing it, there are three types of insulin that serve for different purposes in the body, these are: Rapid or regular-acting insulin, this type of insulin reaches the bloodstream and begins lowering blood sugar within thirty minutes after injected, which is commonly known as “time of onset.” Rapid or regular-acting insulin reaches its maximum strength, or “peaks” about two to five hours later. It remains in the bloodstream for an additional eight to sixteen hours. This type of insulin is often used when a person’s diabetes goes out of control, such as after hormonal shifts, changes in diet or exercise, an accident, minor surgery, or an illness. Intermediate-acting insulin, there are two types of intermediate-acting insulin: Lente (called L) and NPH (called N). This intermediate- or slow-acting insulin reaches the bloodstream about ninety minutes after injection and peak anywhere between four and twelve hours later. They remain in the bloodstream for about twenty-fours. Long-acting insulin or Ultralente (called U), long-acting insulin usually takes about four to six hours to reach the bloodstream, but its effects last for about thirty-six hours. It tends to reach its maximum strength about fourteen to twenty-four hours after it has been injected. Often, people will require a combination of different types of insulin, depending on their individual needs, eating habits, activity schedules, and particular course of disease...
