Common health issues related to poor dietary choices include obesity, diabetes, and heart disease. Diets high in processed foods, added sugars, and unhealthy fats can lead to weight gain and metabolic disorders. Additionally, poor nutrition often results in deficiencies in essential vitamins and minerals, impacting overall health. Such deficiencies can weaken the immune system, making individuals more susceptible to infections. Long-term poor dietary habits can also lead to psychological issues like depression and anxiety, underscoring the necessity of a well-balanced diet for both physical and mental well-being.