Nutritional deficiencies in children can cause significant health problems. Protein deficiencies like marasmus and kwashiorkor result in wasting and edema. Vitamin deficiencies such as vitamins A, D, B1, B2 and niacin can cause conditions like rickets, beriberi, and pellagra. Children are especially vulnerable due to their high nutritional needs for growth. Proper nutrition is essential for normal development and long-term health.