Almonds and walnuts
can improve your immunity because they’re crammed with vitamins B and E, which can also decrease blood pressure and keep oxygen flowing to your body.
But that’s not all. Most nuts, including cashews, pecans, walnuts, pignolis, and Brazil nuts, contain zinc, a mineral key in serotonin production, the metabolizing of fatty acids, and maintaining a healthy immune system. Don’t go overboard, though—many health experts recommend just a single ounce of nuts per day.