Development of Oral Insulin Delivery System in Diabetes - New Insights and Approaches - A Systematic Review

Diabetes is a condition linked to inadequate synthesis or operation of insulin, a peptide hormone produced by the β cells in the pancreatic islets. Subcutaneous administration remains the most popular mode of administration. With the SC route, non-compliance by patients is common. In an attempt to lower the barrier to oral insulin administration, a number of produced. The present review is to gather information from current researchers on oral insulin delivery in order to make it more bioavailable as an injection that is not painful and does not harm to skin as well.

The content is taken from Scifinder, PubMed, Google Scholar, Research Gate, Science Direct, Springer Nature, Bentham Science, PLOS One, MEDLINE, and the NCBI database, etc. Results: Insulin delivery is a major concern nowadays. Due to various drawbacks of subcutaneous injection, academia and industrial researchers are working on oral insulin delivery. Numerous novel formulation of oral delivery of insulin is compiled, like nanoparticles, microspheres, liposomes, hydrogel, and niosomes, focused on the effectiveness of dose-dependent therapy that delivers oral insulin that is equivalent to subcutaneous insulin.

In contrast to the conventional method, novel delivery approaches may improve oral insulin administration. The role of polymers plays an important role in the delivery of insulin through novel approaches.

In this review, we summarize pathophysiology, types, and routes of oral insulin administration, and treatment methods related to oral delivery. Furthermore, we discuss all above mentioned delivery approaches in detail.