Dietary supplements can help you improve or maintain your overall health, and supplements can also help you meet your daily requirements of essential nutrients. While the benefits of some supplements are well established, other supplements need more study. Also, keep in mind that supplements should not take the place of the variety of foods that are important for a healthy diet. 

Examples of supplements that have been extensively studied and have shown positive effects in certain areas include: Omega-3 Fatty Acids, Vitamin D, Probiotics, Calcium and Vitamin D for bone health, Zinc for cold symptoms, Iron for defencies, and Folate during pregnancy.

The popularity and top choices for dietary supplements can vary depending on factors such as personal health goals, individual needs, and current trends. It's important to remember that individual needs may vary, and it's advisable to consult with a healthcare professional or registered dietitian to determine which supplements, if any, are appropriate for your specific health circumstances.