 Here's the rate of cognitive decline in elderly men and women eating a serving a day of green leafies compared to those only eating greens about once every 10 days. The rates of decline among those who consumed one to two servings of greens a day was equivalent to being 11 years younger. So now are you sitting down to a big salad? Greens come up in chapter after chapter. What's the recommendation for preventing age-related macular degeneration, our leading cause of blindness, or even treating it in its earliest stages? Consume a diet high in green leafy vegetables. We're talking two to three servings a day so at least greens at every lunch and supper with bonus points for sneaking them into breakfast and like a green smoothie.