What do all regular insulins contain?

Regular insulins are specifically classified based on their onset, peak, and duration of action. The key characteristic that all regular insulins share is that they contain the letter "R" in their naming convention, which stands for "regular." This is crucial in identifying the type of insulin, as it reflects that it is short-acting and is commonly used to manage blood glucose levels during meals or for correcting high blood sugar.

For instance, common examples include Humulin R and Novolin R, both of which are regular insulins used in various diabetes management plans. Understanding the specific designation of regular insulin is essential for proper administration and to ensure that patients achieve optimal glycemic control. This knowledge is particularly important for healthcare professionals in clinical settings, as they must be able to differentiate between the types of insulin based on their properties and indications.