Vitamin and mineral deficiencies occur when the body does not get enough essential nutrients needed for proper functioning. These nutrients, such as vitamin C, iron, and calcium, play crucial roles in maintaining health. A lack of these vitamins and minerals can lead to various health issues, including fatigue, weakened immunity, and bone problems. Common causes of deficiencies include poor diet, certain medical conditions, and lifestyle choices. For example, people who follow restrictive diets may not consume enough fruits and vegetables, leading to a lack of vital nutrients. Recognizing and addressing these deficiencies is important for overall well-being and health.