Vitamins C, A, and B are supplements that can be taken with iron to improve energy and reduce tiredness and fatigue.

We don't yet know if vitamin D supplements can boost your immune system, as research on the topic has shown mixed results. If you want to try vitamin D supplements for better immune health, your ...

Medically reviewed by Lindsay Cook, PharmD Vitamin C and D are common ingredients in multivitamins and supplements marketed ...