Nanonutraceuticals, which is the joint discipline of nanotechnology and nutraceutical science, represent a parent-back opening kind of advancement in every sense of the word to the field of public health nutrition. To enhance the bioavailability, stability, and targeted delivery of biocompounds, nanonutraceuticals solve the issues long connected with nutrient absorption and therapeutic efficacy. Nanoencapsulation, liposomes, nanoemulsions, and solid lipid nanoparticles are used to target specific nutrients, like curcumin, resveratrol, and green tea polyphenols, to guarantee maximum richness in anti-inflammatory, antioxidant, and metabolic defenses against said nutrients. The scope in this area looks very promising to tackle with deficiency in micronutrients and chronic diseases along with the aspect of age-related healthcare benefits, while energizing personalized nutrition with further support coming from nutrigenomics and AI-driven customization. However, challenges do remain as well as safety, regulatory gaps, and the need for long-term clinical studies. Ensuring standardized processes for manufacturing, toxicological assessment, and regulatory oversight is imperative for safe usage. This further touts that integration of nanonutraceuticals in food fortification and functional foods would make great public health outcomes, particularly in low-income settings. Further work would include advancements in the technology of nanoparticle development and the integration of digital health approaches, including sustainable production. Facilitated by a coordinated policy framework, implementation of research investment, and public engagement, nanonutraceuticals might change preventive and personalized health care, bringing revolution to global nutrition and public health.