Nutraceuticals bolster the immune system by regulating its functions through their antioxidant, antiviral, and anti-inflammatory characteristics, aiding in the prevention of ailments such as infections, heart-related issues, and cancer. They achieve this by supplying vital nutrients, including vitamins and minerals, along with other advantageous substances like probiotics, omega-3 fatty acids, and polyphenols that stimulate immune responses, diminish oxidative stress, and improve overall well-being. Although numerous nutraceuticals, including vitamins, omega-3s, and probiotics, exhibit potential, further extensive clinical trials are frequently required to validate their specific therapeutic benefits. Nutraceuticals are foods that contain all essential components necessary for maintaining optimal health. They are used as alternatives to modern medications to enhance health, increase dietary nutrient levels, and extend lifespan. Due to their expected safety and health benefits, they have generated significant interest. Generally, individuals seeking to enhance their health tend to favor dietary supplements over pharmaceuticals because of the risks of adverse effects and unwanted reactions. Research has shown that nutraceuticals support immune system and cardiovascular health, and they also play a role in cancer and infection prevention.