Ljupco Smokovski/Shutterstock The use of dietary supplements has increased sharply in recent years. Vitamins, minerals and other nutritional products are often marketed as simple ways to boost energy, support immunity, protect brain health or even promote longevity. For many people, taking supplements can feel like a sensible, proactive health habit. But this perception can be misleading. For people who already have adequate nutrition, many supplements offer little or no measurable benefit. Some