What Are Nutritional Deficiencies?

Nutritional deficiencies occur when a person's nutrient intake consistently falls below the recommended requirement. Nutritional diseases are commonly associated with chronic malnutrition. About 1,200 million, or 19% of adolescents suffer from poor nutrition that hurts their development and growth. Additionally, conditions such as obesity from overeating can also cause, or contribute to, serious health problems. Excessive intake of some nutrients can also cause acute poisoning. Nutritional deficiencies often lead to a wide array of diseases, particularly if left untreated.