Over the last 20-30 years, different modifications have been made to the insulin molecule (e.g. altering amino acid sequences or types on the insulin molecule, or adding zinc or protamine) that can influence its rate of uptake into the bloodstream and also affect its duration of action on lowering blood glucose levels.

These modifications have given rise to several classes of commercially available insulin preparations, which will now be outlined.

Topic completed. Click on link at bottom of page to return to topic menu.