Higher omega-3 polyunsaturated fatty acid consumption correlates with improved cardiovascular health, preserved cognitive function, and reduced risk of Alzheimer's disease, arthritis, frailty, and disability in older adults. The review identifies omega-3s' anti-inflammatory and cardio-protective mechanisms as key drivers of these benefits. This evidence reinforces omega-3s as a cornerstone nutrient for healthy aging, particularly given their role in modulating chronic inflammation and oxidative stress—two primary drivers of age-related decline. The findings align with decades of research establishing omega-3s' neuroprotective effects and cardiovascular benefits. However, this appears to be primarily a narrative review rather than a systematic meta-analysis with novel quantitative findings. The practical takeaway remains clear: prioritizing omega-3-rich foods like fatty fish, walnuts, and flaxseeds, or considering supplementation, represents a evidence-backed strategy for supporting healthspan. The secondary focus on enriching dairy cow feed to boost milk omega-3 content suggests food industry applications, though the primary health implications center on direct omega-3 consumption through traditional sources.