New review in Polymer Engineering: Science & Technology surveys how liposomes, nanoparticles, and other nanocarriers are being used to overcome a persistent problem with this popular plant compound: it barely gets absorbed
Quercetin, found in foods such as onions, apples, and berries, has been credited in scientific literature with antioxidant, anti-inflammatory, and other potentially beneficial effects. However, its therapeutic potential is restricted because the body absorbs it inefficiently. The review, surveys the diverse nanotechnology-based strategies currently being developed to overcome this challenge.
A Promising Compound With a Practical Problem
According to the review, quercetin has been investigated for a remarkably broad range of pharmacological activities, including antioxidant, anti-inflammatory, anticancer, antidiabetic, antihypertensive, antiasthmatic, anti-obesity, and antiproliferative effects, across both laboratory and animal studies. Despite this promising evidence, its clinical utility remains limited by its physicochemical properties: quercetin dissolves poorly in water and exhibits low bioavailability, meaning that only a small fraction reaches the bloodstream and tissues where it could exert therapeutic effects.
Why Nanotechnology Is the Focus
The review argues that nanoscale formulation techniques provide a practical solution to these limitations. By encapsulating quercetin within nanocarriers, researchers can protect the compound, enhance its survival through the digestive tract, and deliver it more precisely to target sites. Nanoscale delivery systems can simultaneously address several of quercetin’s key challenges: low bioavailability, premature degradation, potential toxicity, uneven distribution, poor intestinal absorption, and lack of site-specific action.
A Tour of the Nanocarrier Options
The review discusses several major categories of nanocarriers under investigation for quercetin. Polymer-based nanocarriers are noted for improving its ADME(T) profile—absorption, distribution, metabolism, excretion, and toxicity. Lipid-based nanocarriers, particularly liposomes, solid-lipid nanoparticles, and nanostructured lipid carriers, are among the most widely studied, valued for enhancing oral absorption, improving tissue targeting, strengthening therapeutic effects, and enabling controlled release over time. Additional systems include micelles and hydrogels derived from natural or synthetic polymers, as well as cyclodextrins, nanoemulsions, and niosomes, which offer alternative administration routes.
What This Adds Up To
The review does not present new laboratory data but instead synthesizes a rapidly expanding and fragmented body of formulation research into a coherent overview. For researchers working on plant-derived compounds in general, and quercetin in particular, this consolidation clarifies which nanocarrier strategies have been explored, highlights current strengths—such as lipid-based systems for oral delivery—and identifies areas where new formulation approaches may still be developed.
Read the published article here: https://bit.ly/4ypfLnD
The review, "Current Insights in Nanoformulations for Quercetin Delivery," was authored by Dipthi Shree, Chinam Niranjan Patra, and Biswa Mohan Sahoo.
10.2174/0124522716409274251206031536
Current Insights in Nanoformulations for Quercetin Delivery