A poor diet typically consists of foods that are high in sugars, unhealthy fats, and processed ingredients while lacking essential nutrients. This can include excessive consumption of fast food, sugary drinks, and snacks that provide little to no vitamins or minerals. Such eating habits can lead to various health issues, including obesity, diabetes, and heart disease. Additionally, a poor diet often results in insufficient intake of fruits, vegetables, and whole grains, which are vital for maintaining overall health. Without these important food groups, individuals may experience fatigue, weakened immune systems, and other deficiencies that can affect their daily lives and long-term well-being.