56yrs old, for energy , advice ?

Exercise Regularly!: There are plenty of reasons why you should cultivate a relationship with fitness in your fifties, and there are plenty of ways to do it, too. Here are four ways to get fit (in ways that will surprise you!). http://www.vivafifty.com/best-fitness-routines-fifties-933/

Need more info: It is hard to give good advice without knowing more about you. In general I advise a quality multivitamin with at least 4000 iu of Vit D in fall and winter, herbs such as ashwagandha and/or rhodiola, a healthy diet, exercise, adequate sleep and stress reduction. But if that does not help see an integrative Dr. to check for hypothyroidism, food allergies, chronic infections such as parasites etc.