Your immune system consists of a complex collection of cells, processes, and chemicals that defend your bodyTrusted Source against invading pathogens, including viruses, toxins, and bacteria. Keeping your immune system healthy is key to preventing infection and disease. Some research suggests supplementing with certain vitamins, minerals, and herbs may help boost your immune system. However, it’s important to speak with a healthcare professional before trying a new supplement, as some supplements may interact with medications