Virtually all unremarkably, malnourished humans or even animate being either don't develop plenty calories in their diet, or come eating the diet that lacks protein, vitamins, or trace minerals. Medical problems arising from either malnutrition come normally known as deficiency diseases. Scurvy is a well-known & currently uncommon form of malnutrition, where a victim lacks vitamin C.

Most common forms of malnutrition include protein-energy malnutrition (PEM) and micronutrient malnutrition. PEM refers to poor even accessibility or absorption of energy and proteins in the body. Micronutrient malnutrition refers to inadequate accessibility of a select few essential food like vitamins and trace elements that are involved per system around microscopic quantities. Micronutrient deficiencies lead to the kind of diseases & impair convention functioning of the immune system. Deficiency within micronutrients like Vitamin a reduces the capacity of the system to resist diseases. Deficiency inside iron, iodine and vitamin A is widely prevalent & represent major the public health challenge.