Nutritional deficiencies refer to a lack of essential nutrients in an individual's diet, which can lead to various health problems. These deficiencies may result from poor eating habits or certain medical conditions that affect the body's ability to absorb and utilize nutrients properly. Nutritional deficiencies can impact growth, immune function, energy levels, and overall well-being. It is essential to address these deficiencies through dietary changes, supplementation or medical intervention as needed to maintain optimal health.