Mood changes can be closely linked to diet and nutrition through the influence of foods on brain chemistry. Nutrient-rich foods that promote the production of neurotransmitters like serotonin can lead to improved mood and emotional stability. Conversely, diets high in sugar and processed foods may contribute to mood swings and feelings of lethargy or anxiety. Consuming a balanced diet rich in vitamins, minerals, and healthy fats supports overall mental health and can lead to enhanced well-being.