Chronically cranky? Could be you're not eating enough. Regularly skipping -- or skimping on -- meals can mean you're not getting enough serotonin, a brain chemical that helps keep anger in check, suggests new research from the University of Cambridge, in England. Fortunately, you can eat your way calm. Serotonin needs the amino acid tryptophan (known as the turkey drug) to work, and it only comes from food. We asked the Nutrition Twins, Tammy Lakatos Shames and Lyssie Lakatos, for a day's worth of happy meals that pack the biggest mood-boost per bite. Each combo balances a healthy dose of tryptophan with carbs and protein to keep you satisfied -- and smiling.

Breakfast: Oatmeal and eggs. Their fiber and protein give you a long-lasting energy blast to start the day.
Snack: Banana and yogurt. Perk up with yogurt's mood-lifting vitamin D bonus.
Lunch: Baked potato and cheddar cheese. This duo also offers B vitamins to soothe your stress.
Snack: Pistachios and prunes. Rev up with this protein-fiber powerhouse.
Dinner: Salmon and brown rice. The brain-boosting omega-3's and mood-stabilizing fiber help make this meal the ultimate happy fix.

• Apricots
• Asparagus
• Broccoli
• Cauliflower
• Chicken
• Lentils
• Milk
• Mozzarella
• Pumpkin seeds
• Shrimp
• Soybeans
• Spinach
• Tuna

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