How should a person eat in middle age to protect their health as they grow older? One diet came out a clear winner in a 30-year study involving more than 105,000 men and women and eight diets, researchers reported in the journal Nature Medicine . Advertisement People whose dietary pattern more closely stuck to the Alternative Healthy Eating Index in middle-age had the greatest likelihood of good health in their 70s, researchers say. Those with the highest AHEI score had 86% better odds of