Serotonin is the body’s feel-good chemical. If you’re feeling low, you can increase your brain serotonin levels by eating high-protein foods such as eggs, turkey, chicken, and legumes like beans. Fat for the win! Feeding our brains and nervous system with omega-3 fats can help regulate our mood. Oily fish like salmon, tuna, sardines, mackerel, and herring a couple of times a week, or handfuls of nuts and seeds each day. Quality carbs. Because our body turns carbohydrates into glucose, we need to choose the healthy ones if we want to improve our mood. Vegetables, fruits, whole grains, brown rice, legumes, and yoghurt are all good examples of carbs that provide long-lasting energy rather than a quick high, followed by a crash.