What’s the best diet? Is it keto? Paleo? G-free? Do I need to live on acai and buttered coffee?

Healthy-food rule number one: no fad diets, no weird plans, just common sense. A recent analysis of 1,995 people showed that those who ate greater amounts of fruits, vegetables, nuts, legumes, whole grains and low-fat dairy — and lesser amounts of red and processed meats, sugar-sweetened beverages and sodium — slowed their aging at a cellular level. “Foods like sugar and highly processed flour can trigger inflammation in your body and are usually calorie dense as well,” explains registered dietitian Maryann Walsh, a certified diabetes educator and the founder of Walsh Nutrition Consulting.