. . . . "hich also match the national dietary guidelines.A MENTALLY HEALTHY DIETLEAN PROTEIN - fish, chicken, red meat, eggs, legumes, nuts, seeds.DAIRY - yoghurt, milk and cheese, low-fat preferred such as feta or skim-milk cheeses.VEGETABLES - particularly greens.FRUIT - Fruit is great as it is high in fibre and anti-oxidants, says Morris, but she advises to limit fruit intake to two per day as too much" .