Vital Nutrients - Sources and Functions - Infographic If you're unsure which health supplements to buy, you can check out this infographic. It provides a comprehensive guide to essential vitamins and minerals, including their sources and functions. Health supplements come in various forms and serve different purposes to meet consumers' diverse needs. However, if you simply want to boost your nutrient intake, choosing a multivitamin and mineral supplement might be the best option. If you're in Singapore, consider trying these healthier organic health supplements derived from whole foods.