Naringenin (NAR) possesses remarkable hepatoprotective potential. However, its extremely low aqueous solubility and oral bioavailability greatly constrain its therapeutic efficacy. To overcome these limitations, we developed a novel oral nanodelivery system, NanoNAR@Glycygel, by embedding NAR nanosuspensions (NanoNAR) into a self-assembled glycyrrhizin-based hydrogel (Glycygel). The design of this delivery system improves solubility, enhances absorption, and provides synergistic hepatoprotective effects. NanoNAR, when stabilized by the natural biosurfactant glycyrrhizin, exhibited a uniform particle size of approximately 230 nm and showed markedly improved solubility in physiologically relevant media. The hydrogel network formed by Glycygel effectively encapsulated NanoNAR, further enhancing its solubility and controlled release behavior. Pharmacokinetic analyses revealed that NanoNAR@Glycygel significantly enhanced the oral bioavailability of NAR and increased its hepatic accumulation, demonstrating how the synergistic interplay between nanonization and the glycyrrhizin hydrogel matrix facilitates rapid absorption and sustained release. In a cholestatic liver injury mouse model, NanoNAR@Glycygel treatment markedly alleviated cholestasis and hepatic histopathological damage, restoring liver morphology and serum biochemical parameters to near-normal levels. Mechanistic investigations revealed for the first time that HMGB1 signaling is involved in this cholestatic liver injury, and NanoNAR@Glycygel exerted its potent therapeutic effect by inhibiting this signaling. The NanoNAR@Glycygel cloud also reduced malondialdehyde (MDA) levels and enhanced superoxide (SOD) activity, thereby mitigating oxidative injury. Collectively, these findings demonstrate that NanoNAR@Glycygel is a safe, simple, and highly effective oral delivery platform that not only unleashes the therapeutic potential of NAR but also highlights the distinctive advantages of glycyrrhizin-based matrices for the targeted oral delivery of hydrophobic natural bioactives.