Overconsumption of high-calorie foods has been linked with enhanced peripheral Neurotensin (NT) secretion. The elevated endogenous NT participates in lipid absorption in the gastrointestinal tract. An impaired neurotensinergic system leads to metabolic dysregulation, which creates systemic inflammation and oxidative stress, considered risk factors for neurodegeneration. NT receptor-1 (NTR1) antagonist, SR48692, might restrict fat absorption via inhibiting the NT signalling and, thereby, mitigating the neurotoxic effects of high-fat diet (HFD)-induced lipid dysregulation. The present study investigated the neuroprotective effect of SR48692 against HFD-induced alterations in lipid profile and imbalanced redox status. In this study, 36 male Swiss mice were randomly assigned to six groups and were injected intraperitoneally with saline or SR48692 for 4 weeks: group I/regular chow diet (CD); group II/CD + SR48692 100 μg/kg b.w. (SRL); group III/CD + SR48692 400 μg/kg b.w. (SRH); group IV/HFD; group V/HFD + SRL; and group VI/HFD + SRH. Co-treatment with SRL showed improvements concerning lipid metabolic dysregulation and redox balance, as evidenced by decreased triglycerides, total cholesterol, low-density lipoprotein cholesterol, and leptin, and increased high-density lipoprotein cholesterol and antioxidants, observed in hippocampal histomorphometry as modulation in hippocampal cell layer thickness and density. Co-treatment with SRH showed more detrimental effects than HFD in all studied parameters. Similarly, the CD groups treated with both doses of SR48692 showed exacerbated detrimental effects compared to the CD. Collectively, these findings suggested that only SRL showed an ameliorating effect on HFD-induced neurodegeneration. The differential effectiveness of both doses of SR48692 co-treatment in mitigating neurodegeneration via improvement in lipid dysregulation might be due to NTR2 and/or NTR3-mediated lipid absorption.