That’s according to the European Journal of Nutrition. Researchers analyzed the diets of kids from age 6 to 8. And those who ate the most fresh produce, fish, whole grains, and unsaturated fats had the best scores in reading, writing, and comprehension. And those who loaded up on red meat, sugar, fried foods, and processed baked goods had the most trouble reading. The researchers believe it’s because the nutrients in a healthy diet boost brain health – especially in young children whose bodies and brains are still developing. And the nutrients give kids the stamina to stay focused.