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What is What are the Signs and symptoms of PEM  and explain in detail?
Clinical signs and symptoms of PEM include the following: 1. Poor weight gain 2. Slowing of linear growth 3. Behavioral changes: Irritability, apathy, decreased social responsiveness, anxiety, and attention deficits The most common and clinically significant micronutrient deficiencies and their consequences include the following: 1. Iron: Fatigue, anemia, decreased cognitive function, headache, glossitis, and nail   changes 2. Iodine: Goiter, developmental delay, and mental retardation 3. Vitamin D: Poor growth, rickets, and hypocalcemia 4.  Vitamin A: Night blindness, xerophthalmia, poor growth, and hair changes 5. Folate - Glossitis, anemia (megaloblastic), and neural tube defects (in fetuses of women without folate supplementation) 6. Zinc: Anemia, dwarfism, hepatosplenomegaly, hyperpigmentation and hypogonadism, acrodermatitis enteropathica, diminished immune response, and poor wound healing