Gelatin hydrolysate from bigeye snapper fish demonstrated significant neuroprotective effects in rats with chronic cerebral hypoperfusion, a model of vascular dementia. The compound reduced oxidative stress markers including reactive oxygen species and nitric oxide while upregulating superoxide dismutase through Nrf-2 pathway activation. At doses of 250-500 mg/kg daily for 35 days, the treatment also decreased neuronal death markers and improved tau protein regulation. This marine-derived collagen breakdown product represents an intriguing therapeutic avenue for cognitive decline prevention. The Nrf-2 pathway activation is particularly noteworthy, as this master regulator of cellular antioxidant defenses has emerged as a critical target for neurodegeneration interventions. However, the translation from rodent vascular dementia models to human neurodegenerative conditions remains uncertain. The specific bioactive peptides responsible for these effects within the gelatin hydrolysate also require identification. While the anti-oxidative mechanisms align with established theories of brain aging, this appears to be an early-stage investigation requiring human studies to assess practical relevance for cognitive health and longevity applications.