Nutritional deficiencies occur when the body lacks essential vitamins and minerals needed for good health. These deficiencies can result from poor diet, certain medical conditions, or lifestyle choices. For example, a lack of vitamin C can lead to scurvy, while insufficient iron can cause anemia, leaving individuals feeling weak and fatigued. To prevent nutritional deficiencies, it's important to eat a balanced diet rich in fruits, vegetables, whole grains, and proteins. Supplements may also help, but it's best to consult a healthcare professional before starting any. By maintaining proper nutrition, we can support our overall health and well-being.