When it comes to the stuff we consume, we're usually aware of specific things that are beneficial (salads, fruits) and detrimental (French fries, excessive alcohol) to our health. But there are certain foods out there we may or may not already include in our diet that, unbeknownst to us, can provide a much-needed physical or mental boost. Below are 8 foods that have been scientifically proven to make us happier: 1. Mushrooms: This tasty vegetable is the only plant source of natural vitamin D, and foods that contain this essential vitamins boost serotonin in the brain -- putting you in a better mood. Next time you're making a breakfast omelet or lunchtime salad, remember to throw some mushrooms in! 2. Carbs: Even though we're told to steer clear of carbs, a low-carb diet can make us feel sad and stressed. Carbohydrates increase mood-boosting chemicals in the brain. Of course, the trick is to focus on whole-grain sources, not refined carbohydrates. 3. Turmeric: The ...