Q: There’s so much info out there about how to eat so that you slow aging. Can you sum it up so I can make sure I’m getting it right? — Sally U., Joplin, Missouri A: Your diet is an essential tool in the battle against premature aging and chronic disease. But you also want to combine it with stress management (without that, you may trigger epigenetic changes that speed aging and turn off immune protection against disease), establish a supportive posse, find a purpose in your life, get plenty of physical activity and adopt good sleep habits. The “6 Normals + 2″ series of smart health goals tha…