Phytochemical Nanoformulations for Insulin Resistance and β-Cell Protection in Diabetes

Nabuuma Ruth Nambi

Department of Pharmacy Kampala International University Uganda

Email: nambi.nabuuma@studwc.kiu.ac.ug

                                                                               ABSTRACT
Insulin resistance and progressive pancreatic β-cell failure are the twin biological engines of type 2 diabetes and major determinants of long-term complications. Phytochemicals such as curcumin, resveratrol, quercetin, epigallocatechin gallate, berberine, ginsenosides, and thymoquinone can enhance insulin signaling, reduce hepatic gluconeogenesis, improve adipokine balance, attenuate oxidative stress, and limit β-cell apoptosis. Yet translation is constrained by poor solubility, low oral bioavailability, chemical instability, rapid metabolism, and non-specific biodistribution. Nanoformulations such as liposomes, polymeric nanoparticles, solid lipid nanoparticles, nanostructured lipid carriers, nanoemulsions, and polysaccharide nanogels address these barriers by protecting labile compounds, improving dissolution and permeability, and enabling controlled or stimuliresponsive release. Surface engineering with peptides, sugars, or antibodies can bias delivery toward insulinresponsive tissues or inflamed islets, while glucose- and ROS-responsive matrices provide on-demand release in hyperglycemic, oxidative microenvironments. Preclinical studies frequently show superior reductions in fasting and postprandial glucose, improved HOMA-IR, restoration of GLUT4 translocation, and preservation of β-cell mass compared with free phytochemicals, with early human data emerging for select formulations. This review summarizes mechanistic targets, nanocarrier designs, evidence trends, safety considerations, and translational priorities for phytochemical nanomedicine. We emphasize rational carrier selection, standardized extract characterization, and head-to-head comparisons that disentangle carrier effects from payload activity, guiding scalable, clinically relevant future development.

Keywords: phytochemicals; nanoformulations; insulin resistance; β-cell protection; targeted delivery.

CITE AS: Nabuuma Ruth Nambi (2026). Phytochemical Nanoformulations for Insulin Resistance and β-Cell Protection in Diabetes. IDOSR JOURNAL OF SCIENTIFIC RESEARCH 11(2):119- 130. https://doi.org/10.59298/IDOSRJSR/2026/11.2.119130